internalization vs American spelling

internalization and American spelling both are nouns.

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

internalization (noun)	American spelling (noun)
learning (of values or attitudes etc.) that is incorporated within yourself	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')