mustache vs American spelling

mustache and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
mustache	Yes	No	No	No
American spelling	Yes	No	No	No

mustache (noun)	American spelling (noun)
an unshaved growth of hair on the upper lip	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')