American spelling vs institutionalize

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

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

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

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