American spelling vs colonization

American spelling and colonization both are nouns.

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

American spelling (noun)	colonization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of colonizing; the establishment of colonies