colonization vs American spelling

colonization and American spelling both are nouns.

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

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