diff --git a/Changelog.md b/Changelog.md
index ec24544ab..e45646c91 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -5,6 +5,7 @@ Breaking changes:
  * Constructors should not have visibility.
  * Deprecated dot syntax for `value` and `gas`.
  * Deprecated the identifier `now`.
+ * Disallow `gwei` as identifier.
  * JSON AST: Removes members with ``null`` value from JSON output.
  * Parser: NatSpec comments on variables are only allowed for public state variables.
  * Type Checker: Disallow shifts by signed types.
@@ -15,6 +16,7 @@ Breaking changes:
  * ``using A for B`` only affects the contract it is mentioned in and not all derived contracts
  * Inline Assembly: Disallow `.` in user-defined function and variable names.
  * Inline Assembly: Slot and offset of storage pointer variable ``x`` are accessed via ``x.slot`` and ``x.offset`` instead of ``x_slot`` and ``x_offset``.
+ * Remove the finney and szabo denominations.
 
 Language Features:
  * Yul: Disallow EVM instruction `pc()`.
diff --git a/docs/Solidity.g4 b/docs/Solidity.g4
index d4e86c523..f86d95fc4 100644
--- a/docs/Solidity.g4
+++ b/docs/Solidity.g4
@@ -361,11 +361,12 @@ assemblyType
 subAssembly
   : 'assembly' identifier assemblyBlock ;
 
+// 'finney' and 'szabo' are no longer supported as denominations by latest Solidity.
 numberLiteral
-  : (DecimalNumber | HexNumber) (NumberUnit | Gwei)?;
+  : (DecimalNumber | HexNumber) (NumberUnit | Gwei | Finney | Szabo)?;
 
 identifier
-  : (Gwei | 'from' | 'calldata' | 'address' | Identifier) ;
+  : (Gwei | Finney | Szabo | 'from' | 'calldata' | 'address' | Identifier) ;
 
 BooleanLiteral
   : 'true' | 'false' ;
@@ -385,10 +386,12 @@ HexDigits
   : HexCharacter ( '_'? HexCharacter )* ;
 
 NumberUnit
-  : 'wei' | 'szabo' | 'finney' | 'ether'
+  : 'wei' | 'ether'
   | 'seconds' | 'minutes' | 'hours' | 'days' | 'weeks' | 'years' ;
 
 Gwei: 'gwei' ;
+Szabo: 'szabo' ;
+Finney: 'finney' ;
 
 HexLiteralFragment
   : 'hex' (('"' HexDigits? '"') | ('\'' HexDigits? '\'')) ;
diff --git a/docs/units-and-global-variables.rst b/docs/units-and-global-variables.rst
index 28232f6a9..a32900a50 100644
--- a/docs/units-and-global-variables.rst
+++ b/docs/units-and-global-variables.rst
@@ -2,23 +2,23 @@
 Units and Globally Available Variables
 **************************************
 
-.. index:: wei, finney, szabo, ether
+.. index:: wei, finney, szabo, gwei, ether
 
 Ether Units
 ===========
 
-A literal number can take a suffix of ``wei``, ``gwei``, ``finney``, ``szabo`` or ``ether`` to specify a subdenomination of Ether, where Ether numbers without a postfix are assumed to be Wei.
+A literal number can take a suffix of ``wei``, ``gwei`` or ``ether`` to specify a subdenomination of Ether, where Ether numbers without a postfix are assumed to be Wei.
 
 ::
 
     assert(1 wei == 1);
     assert(1 gwei == 1e9);
-    assert(1 szabo == 1e12);
-    assert(1 finney == 1e15);
     assert(1 ether == 1e18);
 
 The only effect of the subdenomination suffix is a multiplication by a power of ten.
 
+.. note::
+    The denominations ``finney`` and ``szabo`` have been removed in version 0.7.0.
 
 .. index:: time, seconds, minutes, hours, days, weeks, years
 
diff --git a/liblangutil/Token.h b/liblangutil/Token.h
index 916f71c75..cea102f0f 100644
--- a/liblangutil/Token.h
+++ b/liblangutil/Token.h
@@ -196,8 +196,7 @@ namespace solidity::langutil
 	\
 	/* Ether subdenominations */                                       \
 	K(SubWei, "wei", 0)                                                \
-	K(SubSzabo, "szabo", 0)                                            \
-	K(SubFinney, "finney", 0)                                          \
+	K(SubGwei, "gwei", 0)                                              \
 	K(SubEther, "ether", 0)                                            \
 	K(SubSecond, "seconds", 0)                                         \
 	K(SubMinute, "minutes", 0)                                         \
@@ -232,7 +231,6 @@ namespace solidity::langutil
 	\
 	/* Identifiers (not keywords or future reserved words). */         \
 	T(Identifier, nullptr, 0)                                          \
-	T(SubGwei, "gwei", 0)                                              \
 	\
 	/* Keywords reserved for future use. */                            \
 	K(After, "after", 0)                                               \
@@ -313,7 +311,7 @@ namespace TokenTraits
 			|| op == Token::Pure || op == Token::View || op == Token::Payable;
 	}
 
-	constexpr bool isEtherSubdenomination(Token op) { return op == Token::SubWei || op == Token::SubSzabo || op == Token::SubFinney || op == Token::SubEther; }
+	constexpr bool isEtherSubdenomination(Token op) { return op >= Token::SubWei && op <= Token::SubEther; }
 	constexpr bool isTimeSubdenomination(Token op) { return op == Token::SubSecond || op == Token::SubMinute || op == Token::SubHour || op == Token::SubDay || op == Token::SubWeek || op == Token::SubYear; }
 	constexpr bool isReservedKeyword(Token op) { return (Token::After <= op && op <= Token::Unchecked); }
 
diff --git a/libsolidity/ast/AST.h b/libsolidity/ast/AST.h
index 9fcbe2926..ec37044a4 100644
--- a/libsolidity/ast/AST.h
+++ b/libsolidity/ast/AST.h
@@ -2086,8 +2086,6 @@ public:
 		None = static_cast<int>(Token::Illegal),
 		Wei = static_cast<int>(Token::SubWei),
 		Gwei = static_cast<int>(Token::SubGwei),
-		Szabo = static_cast<int>(Token::SubSzabo),
-		Finney = static_cast<int>(Token::SubFinney),
 		Ether = static_cast<int>(Token::SubEther),
 		Second = static_cast<int>(Token::SubSecond),
 		Minute = static_cast<int>(Token::SubMinute),
diff --git a/libsolidity/ast/ASTJsonImporter.cpp b/libsolidity/ast/ASTJsonImporter.cpp
index 1d9f77ad1..dfce6cb41 100644
--- a/libsolidity/ast/ASTJsonImporter.cpp
+++ b/libsolidity/ast/ASTJsonImporter.cpp
@@ -1004,10 +1004,6 @@ Literal::SubDenomination ASTJsonImporter::subdenomination(Json::Value const& _no
 		return Literal::SubDenomination::Wei;
 	else if (subDenStr == "gwei")
 		return Literal::SubDenomination::Gwei;
-	else if (subDenStr == "szabo")
-		return Literal::SubDenomination::Szabo;
-	else if (subDenStr == "finney")
-		return Literal::SubDenomination::Finney;
 	else if (subDenStr == "ether")
 		return Literal::SubDenomination::Ether;
 	else if (subDenStr == "seconds")
diff --git a/libsolidity/ast/Types.cpp b/libsolidity/ast/Types.cpp
index e50c4b617..a3521adbd 100644
--- a/libsolidity/ast/Types.cpp
+++ b/libsolidity/ast/Types.cpp
@@ -988,12 +988,6 @@ tuple<bool, rational> RationalNumberType::isValidLiteral(Literal const& _literal
 		case Literal::SubDenomination::Gwei:
 			value *= bigint("1000000000");
 			break;
-		case Literal::SubDenomination::Szabo:
-			value *= bigint("1000000000000");
-			break;
-		case Literal::SubDenomination::Finney:
-			value *= bigint("1000000000000000");
-			break;
 		case Literal::SubDenomination::Ether:
 			value *= bigint("1000000000000000000");
 			break;
diff --git a/libsolidity/parsing/Parser.cpp b/libsolidity/parsing/Parser.cpp
index 819d18a79..ab8180dc7 100644
--- a/libsolidity/parsing/Parser.cpp
+++ b/libsolidity/parsing/Parser.cpp
@@ -1825,16 +1825,11 @@ ASTPointer<Expression> Parser::parsePrimaryExpression()
 		expression = nodeFactory.createNode<Literal>(token, getLiteralAndAdvance());
 		break;
 	case Token::Number:
-		if (
-			(m_scanner->peekNextToken() == Token::Identifier && m_scanner->peekLiteral() == "gwei") ||
-			TokenTraits::isEtherSubdenomination(m_scanner->peekNextToken())
-		)
+		if (TokenTraits::isEtherSubdenomination(m_scanner->peekNextToken()))
 		{
 			ASTPointer<ASTString> literal = getLiteralAndAdvance();
 			nodeFactory.markEndPosition();
-			Token actualToken = m_scanner->currentToken() == Token::Identifier ? Token::SubGwei : m_scanner->currentToken();
-
-			Literal::SubDenomination subdenomination = static_cast<Literal::SubDenomination>(actualToken);
+			Literal::SubDenomination subdenomination = static_cast<Literal::SubDenomination>(m_scanner->currentToken());
 			m_scanner->next();
 			expression = nodeFactory.createNode<Literal>(token, literal, subdenomination);
 		}
diff --git a/test/ExecutionFramework.h b/test/ExecutionFramework.h
index 6fea5310a..5e660c805 100644
--- a/test/ExecutionFramework.h
+++ b/test/ExecutionFramework.h
@@ -45,13 +45,9 @@ using rational = boost::rational<bigint>;
 /// @NOTE This is not endian-specific; it's just a bunch of bytes.
 using Address = util::h160;
 
-// The various denominations; here for ease of use where needed within code.
-static const u256 wei = 1;
-static const u256 shannon = u256("1000000000");
-static const u256 gwei = shannon;
-static const u256 szabo = shannon * 1000;
-static const u256 finney = szabo * 1000;
-static const u256 ether = finney * 1000;
+// The ether and gwei denominations; here for ease of use where needed within code.
+static const u256 gwei = u256(1) << 9;
+static const u256 ether = u256(1) << 18;
 
 class ExecutionFramework
 {
@@ -287,7 +283,7 @@ protected:
 	bool m_transactionSuccessful = true;
 	Address m_sender = account(0);
 	Address m_contractAddress;
-	u256 const m_gasPrice = 100 * szabo;
+	u256 const m_gasPrice = 10 * gwei;
 	u256 const m_gas = 100000000;
 	bytes m_output;
 	u256 m_gasUsed;
diff --git a/test/libsolidity/SolidityExpressionCompiler.cpp b/test/libsolidity/SolidityExpressionCompiler.cpp
index 10083b827..5885bc616 100644
--- a/test/libsolidity/SolidityExpressionCompiler.cpp
+++ b/test/libsolidity/SolidityExpressionCompiler.cpp
@@ -236,37 +236,6 @@ BOOST_AUTO_TEST_CASE(int_with_gwei_ether_subdenomination)
 	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
 }
 
-BOOST_AUTO_TEST_CASE(int_with_szabo_ether_subdenomination)
-{
-	char const* sourceCode = R"(
-		contract test {
-			function test () {
-				uint x = 1 szabo;
-			}
-		}
-	)";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({uint8_t(Instruction::PUSH5), 0xe8, 0xd4, 0xa5, 0x10, 0x00});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
-}
-
-BOOST_AUTO_TEST_CASE(int_with_finney_ether_subdenomination)
-{
-	char const* sourceCode = R"(
-		contract test {
-			constructor()
-			{
-				 uint x = 1 finney;
-			}
-		}
-	)";
-	bytes code = compileFirstExpression(sourceCode);
-
-	bytes expectation({uint8_t(Instruction::PUSH7), 0x3, 0x8d, 0x7e, 0xa4, 0xc6, 0x80, 0x00});
-	BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
-}
-
 BOOST_AUTO_TEST_CASE(int_with_ether_ether_subdenomination)
 {
 	char const* sourceCode = R"(
diff --git a/test/libsolidity/SolidityScanner.cpp b/test/libsolidity/SolidityScanner.cpp
index b02a910a5..5b83778ba 100644
--- a/test/libsolidity/SolidityScanner.cpp
+++ b/test/libsolidity/SolidityScanner.cpp
@@ -428,11 +428,9 @@ BOOST_AUTO_TEST_CASE(comments_mixed_in_sequence)
 
 BOOST_AUTO_TEST_CASE(ether_subdenominations)
 {
-	Scanner scanner(CharStream("wei gwei szabo finney ether", ""));
+	Scanner scanner(CharStream("wei gwei ether", ""));
 	BOOST_CHECK_EQUAL(scanner.currentToken(), Token::SubWei);
-	BOOST_CHECK_EQUAL(scanner.next(), Token::Identifier);
-	BOOST_CHECK_EQUAL(scanner.next(), Token::SubSzabo);
-	BOOST_CHECK_EQUAL(scanner.next(), Token::SubFinney);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::SubGwei);
 	BOOST_CHECK_EQUAL(scanner.next(), Token::SubEther);
 }
 
diff --git a/test/libsolidity/semanticTests/literals/denominations.sol b/test/libsolidity/semanticTests/literals/denominations.sol
new file mode 100644
index 000000000..256525cb9
--- /dev/null
+++ b/test/libsolidity/semanticTests/literals/denominations.sol
@@ -0,0 +1,9 @@
+contract C {
+	uint constant x = 1 ether + 1 gwei + 1 wei;
+
+	function f() public view returns(uint) { return x; }
+}
+// ====
+// compileViaYul: also
+// ----
+// f() -> 1000000001000000001
diff --git a/test/libsolidity/semanticTests/literals/ether.sol b/test/libsolidity/semanticTests/literals/ether.sol
new file mode 100644
index 000000000..f03171796
--- /dev/null
+++ b/test/libsolidity/semanticTests/literals/ether.sol
@@ -0,0 +1,9 @@
+contract C {
+	uint constant x = 1 ether;
+
+	function f() public view returns(uint) { return x; }
+}
+// ====
+// compileViaYul: also
+// ----
+// f() -> 1000000000000000000
diff --git a/test/libsolidity/semanticTests/literals/gwei.sol b/test/libsolidity/semanticTests/literals/gwei.sol
index 7762021dc..54870040f 100644
--- a/test/libsolidity/semanticTests/literals/gwei.sol
+++ b/test/libsolidity/semanticTests/literals/gwei.sol
@@ -1,7 +1,7 @@
 contract C {
-	uint constant gwei = 1 gwei;
+	uint constant x = 1 gwei;
 
-	function f() public view returns(uint) { return gwei; }
+	function f() public view returns(uint) { return x; }
 }
 // ====
 // compileViaYul: also
diff --git a/test/libsolidity/semanticTests/literals/wei.sol b/test/libsolidity/semanticTests/literals/wei.sol
new file mode 100644
index 000000000..59af2a3d7
--- /dev/null
+++ b/test/libsolidity/semanticTests/literals/wei.sol
@@ -0,0 +1,9 @@
+contract C {
+	uint constant x = 1 wei;
+
+	function f() public view returns(uint) { return x; }
+}
+// ====
+// compileViaYul: also
+// ----
+// f() -> 1
diff --git a/test/libsolidity/syntaxTests/denominations/denominations.sol b/test/libsolidity/syntaxTests/denominations/denominations.sol
index a34c03de0..3c1c305cf 100644
--- a/test/libsolidity/syntaxTests/denominations/denominations.sol
+++ b/test/libsolidity/syntaxTests/denominations/denominations.sol
@@ -1,7 +1,7 @@
 contract C {
-	uint constant a = 1 wei + 2 szabo + 3 finney + 4 ether;
+	uint constant a = 1 wei + 4 ether;
 	uint constant b = 1 seconds + 2 minutes + 3 hours + 4 days + 5 weeks;
-	uint constant c = 2 szabo / 1 seconds + 3 finney * 3 hours;
-	uint constant d = 2 gwei / 1 seconds + 3 finney * 3 hours;
+	uint constant c = 2 ether / 1 seconds + 3 gwei * 3 hours;
+	uint constant d = 2 gwei / 1 seconds + 3 minutes * 3 hours;
 }
 // ----
diff --git a/test/libsolidity/syntaxTests/denominations/finney_invalid.sol b/test/libsolidity/syntaxTests/denominations/finney_invalid.sol
new file mode 100644
index 000000000..b7bae7fa7
--- /dev/null
+++ b/test/libsolidity/syntaxTests/denominations/finney_invalid.sol
@@ -0,0 +1,7 @@
+contract C {
+  function f() {
+    uint x = 1 finney;
+  }
+}
+// ----
+// ParserError 2314: (45-51): Expected ';' but got identifier
diff --git a/test/libsolidity/syntaxTests/denominations/gwei.sol b/test/libsolidity/syntaxTests/denominations/gwei.sol
deleted file mode 100644
index 5bc5edb3d..000000000
--- a/test/libsolidity/syntaxTests/denominations/gwei.sol
+++ /dev/null
@@ -1,3 +0,0 @@
-contract C {
-	uint constant gwei = 1 gwei;
-}
diff --git a/test/libsolidity/syntaxTests/denominations/gwei_as_identifier.sol b/test/libsolidity/syntaxTests/denominations/gwei_as_identifier.sol
new file mode 100644
index 000000000..43fde5ed7
--- /dev/null
+++ b/test/libsolidity/syntaxTests/denominations/gwei_as_identifier.sol
@@ -0,0 +1,5 @@
+contract C {
+	uint constant gwei = 1;
+}
+// ----
+// ParserError 2314: (28-32): Expected identifier but got 'gwei'
diff --git a/test/libsolidity/syntaxTests/denominations/szabo_finney_identifiers.sol b/test/libsolidity/syntaxTests/denominations/szabo_finney_identifiers.sol
new file mode 100644
index 000000000..8facd62d4
--- /dev/null
+++ b/test/libsolidity/syntaxTests/denominations/szabo_finney_identifiers.sol
@@ -0,0 +1,6 @@
+contract C {
+  function f(uint finney) public pure returns (uint szabo) {
+    // These used to be denominations.
+    szabo = finney;
+  }
+}
\ No newline at end of file
diff --git a/test/libsolidity/syntaxTests/denominations/szabo_invalid.sol b/test/libsolidity/syntaxTests/denominations/szabo_invalid.sol
new file mode 100644
index 000000000..d206830d5
--- /dev/null
+++ b/test/libsolidity/syntaxTests/denominations/szabo_invalid.sol
@@ -0,0 +1,7 @@
+contract C {
+  function f() {
+    uint x = 1 szabo;
+  }
+}
+// ----
+// ParserError 2314: (45-50): Expected ';' but got identifier
diff --git a/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations.sol b/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations.sol
index 51ce8b4d5..6b3ccc7c0 100644
--- a/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations.sol
+++ b/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations.sol
@@ -2,15 +2,11 @@ contract C {
     function f() public
     {
          a = 1 wei;
-         b = 2 szabo;
-         c = 3 finney;
-         d = 4 ether;
-         e = 5 gwei;
+         b = 2 ether;
+         c = 3 gwei;
     }
     uint256 a;
     uint256 b;
     uint256 c;
-    uint256 d;
-    uint256 e;
 }
 // ----
diff --git a/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations_in_expressions.sol b/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations_in_expressions.sol
index efe2d2670..537320737 100644
--- a/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations_in_expressions.sol
+++ b/test/libsolidity/syntaxTests/parsing/literal_constants_with_ether_subdenominations_in_expressions.sol
@@ -1,7 +1,7 @@
 contract c {
     constructor()
     {
-         a = 1 wei * 100 wei + 7 szabo - 3;
+         a = 1 wei * 100 wei + 7 gwei - 3;
     }
     uint256 a;
 }
diff --git a/test/tools/ossfuzz/config/solidity.dict b/test/tools/ossfuzz/config/solidity.dict
index f788d49c2..f80fab989 100644
--- a/test/tools/ossfuzz/config/solidity.dict
+++ b/test/tools/ossfuzz/config/solidity.dict
@@ -6,7 +6,6 @@
 " block.timestamp "
 " days "
 " ether "
-" finney "
 " gasleft() "
 " gwei "
 " hours "
@@ -18,7 +17,6 @@
 " msg.value "
 " now "
 " seconds "
-" szabo "
 " tx.gasprice "
 " tx.origin "
 " weeks "