hypothesize vs American spelling

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

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

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

hypothesize (verb)	American spelling (verb)
to believe especially on uncertain or tentative grounds