American spelling vs appall

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

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

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

American spelling (verb)	appall (verb)
	strike with disgust or revulsion
	fill with apprehension or alarm; cause to be unpleasantly surprised