American spelling vs vulcanize

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

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

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

American spelling (verb)	vulcanize (verb)
	undergo vulcanization
	subject to vulcanization