American spelling vs fervor

American spelling and fervor both are nouns.

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

American spelling (noun)	fervor (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	feelings of great warmth and intensity
	the state of being emotionally aroused and worked up