Eliminates word variants, refs #3024

Author: JJ

doc/Language/traits.pod6

@@ -92,7 +92,7 @@ all objects in Perl 6.
     class Thar {};
     say Thar.REPR;    #OUTPUT: «P6opaque␤»
 
-The L<meta object protocol|/language/mop> uses it by default for every object
+The L<metaobject protocol|/language/mop> uses it by default for every object
 and class unless specified otherwise; for that reason, it is in general not
 necessary unless you are effectively working with that interface.
 

doc/Language/traps.pod6

@@ -333,7 +333,7 @@ while $++ > 5 { .say }
 =head3 Reduction vs. Array constructor ambiguity
 
 =for code :skip-test<illustrates error>
-# WRONG; ambiguity with `[<]` meta op:
+# WRONG; ambiguity with `[<]` metaop:
 my @a = [[<foo>],];
 
 =begin code

doc/Language/typesystem.pod6

@@ -12,7 +12,7 @@ object is a subclass of L<Any|/type/Any> or L<Mu|/type/Mu>. Introspection
 methods are provided via inheritance from those base classes and the
 introspection postfix L<.^|/language/operators#postfix_.^>. A new type is
 introduced to the current scope by one of the following type declarators at
-compile time or with the L<meta object protocol|/language/mop> at runtime. All
+compile time or with the L<metaobject protocol|/language/mop> at runtime. All
 type names must be unique in their scope.
 
 =head2 Default types
@@ -818,7 +818,7 @@ creating a List of Pairs.
 
 =head3 Metaclass
 
-To test if a given type object is an C<enum>, test the meta object method
+To test if a given type object is an C<enum>, test the metaobject method
 C<.HOW> against L<Metamodel::EnumHOW|/type/Metamodel::EnumHOW> or simply test
 against the C<Enumeration> role.