theorize vs American spelling

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

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

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

theorize (verb)	American spelling (verb)
to believe especially on uncertain or tentative grounds
form or construct theories
construct a theory about