diff --git a/utils/gyb_syntax_support/AttributeNodes.py b/utils/gyb_syntax_support/AttributeNodes.py
index 2f91125d76f7e..9e76cee916099 100644
--- a/utils/gyb_syntax_support/AttributeNodes.py
+++ b/utils/gyb_syntax_support/AttributeNodes.py
@@ -162,7 +162,7 @@
                    description='The label of the argument'),
              Child('Colon', kind='ColonToken',
                    description='The colon separating the label and the value'),
-             Child('Delcname', kind='DeclName',
+             Child('Declname', kind='DeclName',
                    description='The value for this argument'),
              Child('TrailingComma', kind='CommaToken',
                    is_optional=True, description='''
@@ -236,7 +236,7 @@
     # objc-selector-piece -> identifier? ':'?
     Node('ObjCSelectorPiece', kind='Syntax',
          description='''
-         A piece of an Objective-C selector. Either consisiting of just an
+         A piece of an Objective-C selector. Either consisting of just an
          identifier for a nullary selector, an identifier and a colon for a
          labeled argument or just a colon for an unlabeled argument
          ''',
diff --git a/utils/gyb_syntax_support/AvailabilityNodes.py b/utils/gyb_syntax_support/AvailabilityNodes.py
index 7c1883112885f..2e462366a3249 100644
--- a/utils/gyb_syntax_support/AvailabilityNodes.py
+++ b/utils/gyb_syntax_support/AvailabilityNodes.py
@@ -79,7 +79,7 @@
     Node('VersionTuple', kind='Syntax',
          description='''
          A version number of the form major.minor.patch in which the minor
-         and patch part may be ommited.
+         and patch part may be omitted.
          ''',
          children=[
              Child('MajorMinor', kind='Syntax',
diff --git a/utils/gyb_syntax_support/Classification.py b/utils/gyb_syntax_support/Classification.py
index fa11b05a35f2c..a2c0a66ec70ac 100644
--- a/utils/gyb_syntax_support/Classification.py
+++ b/utils/gyb_syntax_support/Classification.py
@@ -39,7 +39,7 @@ def __init__(self, name, description):
     A string literal including multiline string literals.
     '''),
     SyntaxClassification('StringInterpolationAnchor', description='''
-    The opening and closing paranthesis of string interpolation.
+    The opening and closing parenthesis of string interpolation.
     '''),
     SyntaxClassification('PoundDirectiveKeyword', description='''
     A `#` keyword like `#warning`.
diff --git a/utils/gyb_syntax_support/ExprNodes.py b/utils/gyb_syntax_support/ExprNodes.py
index 0202c538b8dd4..c8ff4d9801543 100644
--- a/utils/gyb_syntax_support/ExprNodes.py
+++ b/utils/gyb_syntax_support/ExprNodes.py
@@ -601,7 +601,7 @@
              Child('RightParen', kind='RightParenToken'),
          ]),
 
-    # postfix '#if' expession
+    # postfix '#if' expression
     Node('PostfixIfConfigExpr', kind='Expr',
          children=[
              Child('Base', kind='Expr', is_optional=True),
diff --git a/utils/gyb_syntax_support/GenericNodes.py b/utils/gyb_syntax_support/GenericNodes.py
index 67ed4faba4ea5..a218f69d0096a 100644
--- a/utils/gyb_syntax_support/GenericNodes.py
+++ b/utils/gyb_syntax_support/GenericNodes.py
@@ -15,7 +15,7 @@
          element_name='GenericRequirement'),
 
     # generic-requirement ->
-    #     (same-type-requrement|conformance-requirement) ','?
+    #     (same-type-requirement|conformance-requirement) ','?
     Node('GenericRequirement', kind='Syntax',
          traits=['WithTrailingComma'],
          children=[
diff --git a/utils/gyb_syntax_support/StmtNodes.py b/utils/gyb_syntax_support/StmtNodes.py
index 349e664e42dea..71beec3b5c6c8 100644
--- a/utils/gyb_syntax_support/StmtNodes.py
+++ b/utils/gyb_syntax_support/StmtNodes.py
@@ -197,8 +197,8 @@
              Child('Condition', kind='Syntax',
                    node_choices=[
                        Child('Expression', kind='Expr'),
-                       Child('Availablity', kind='AvailabilityCondition'),
-                       Child('Unavailablity', kind='UnavailabilityCondition'),
+                       Child('Availability', kind='AvailabilityCondition'),
+                       Child('Unavailability', kind='UnavailabilityCondition'),
                        Child('MatchingPattern',
                              kind='MatchingPatternCondition'),
                        Child('OptionalBinding',
diff --git a/utils/gyb_syntax_support/TypeNodes.py b/utils/gyb_syntax_support/TypeNodes.py
index 748a47bcf2ebb..1851850d37fc0 100644
--- a/utils/gyb_syntax_support/TypeNodes.py
+++ b/utils/gyb_syntax_support/TypeNodes.py
@@ -182,7 +182,7 @@
          ]),
 
     # attributed-type -> type-specifier? attribute-list? type
-    # type-specifiyer -> 'inout' | '__owned' | '__unowned'
+    # type-specifier -> 'inout' | '__owned' | '__unowned'
     Node('AttributedType', kind='Type',
          children=[
              Child('Specifier', kind='Token',