signaling vs American spelling

signaling and American spelling both are nouns.

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

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