American spelling vs maximizing

American spelling is a noun but maximizing is not a noun.

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

American spelling (noun)	maximizing (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

American spelling (adjective)	maximizing (adjective)
	making as great as possible