vulcanization vs American spelling

vulcanization and American spelling both are nouns.

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

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