American spelling vs favor

American spelling and favor both are nouns.

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

American spelling (noun)	favor (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	an act of gracious kindness
	souvenir consisting of a small gift given to a guest at a party
	an advantage to the benefit of someone or something
	an inclination to approve
	a feeling of favorable regard