polymerize vs American spelling

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

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

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

polymerize (verb)	American spelling (verb)
undergo polymerization
cause (a compound) to polymerize