counterfeit vs artificial

counterfeit is a noun but artificial is not a noun.

Word	Noun	Adjective	Verb	Adverb
counterfeit	Yes	Yes	Yes	No
artificial	No	Yes	No	No

counterfeit (noun)	artificial (noun)
a copy that is represented as the original

counterfeit (adjective)	artificial (adjective)
not genuine; imitating something superior	contrived by art rather than nature
	artificially formal
	not arising from natural growth or characterized by vital processes

counterfeit (verb)	artificial (verb)
make a copy of with the intent to deceive