overspecialize vs American spelling

overspecialize is not a noun while American spelling is a noun.

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

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

overspecialize (verb)	American spelling (verb)
become overly specialized