American spelling vs immunize

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

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

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

American spelling (verb)	immunize (verb)
	perform vaccinations or produce immunity in by inoculation
	grant immunity from prosecution