American spelling vs signalize

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

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

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

American spelling (verb)	signalize (verb)
	make conspicuous or noteworthy
	communicate silently and non-verbally by signals or signs
	point out carefully and clearly
	provide with traffic signals