acetylize vs American spelling

acetylize is not a noun while American spelling is a noun.

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

acetylize (noun)	American spelling (noun)
	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

acetylize (verb)	American spelling (verb)
receive substitution of an acetyl group
introduce an acetyl group into (a chemical compound)