American spelling vs immunization

American spelling and immunization both are nouns.

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

American spelling (noun)	immunization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of making immune (especially by inoculation)