vapor vs American spelling

vapor and American spelling both are nouns.

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

vapor (noun)	American spelling (noun)
the process of becoming a vapor	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
a visible suspension in the air of particles of some substance