institutionalize vs American spelling

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

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

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

institutionalize (verb)	American spelling (verb)
cause to be admitted; of persons to an institution