esthetics vs American spelling

esthetics and American spelling both are nouns.

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

esthetics (noun)	American spelling (noun)
(art) the branch of philosophy dealing with beauty and taste (emphasizing the evaluative criteria that are applied to art)	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')