American spelling vs acclimatization

American spelling and acclimatization both are nouns.

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

American spelling (noun)	acclimatization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	adaptation to a new climate (a new temperature or altitude or environment)