American spelling vs miniaturize

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

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

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

American spelling (verb)	miniaturize (verb)
	design or construct on a smaller scale