American spelling vs unsympathizing

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

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

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

American spelling (adjective)	unsympathizing (adjective)
	not showing or expressing sympathy