American spelling vs vulcanization

American spelling and vulcanization both are nouns.

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

American spelling (noun)	vulcanization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	process of treating rubber or rubberlike materials with sulphur at great heat to improve elasticity and strength or to harden them