American spelling vs signaling

American spelling and signaling both are nouns.

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

American spelling (noun)	signaling (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	any nonverbal action or gesture that encodes a message