American spelling vs maximization

American spelling and maximization both are nouns.

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

American spelling (noun)	maximization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of raising to the highest possible point or condition or position
	the mathematical process of finding the maximum value of a function