American spelling vs severalize

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

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

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

American spelling (verb)	severalize (verb)
	mark as different
	distinguish or separate