good humor vs American spelling

good humor and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
good humor	Yes	No	No	No
American spelling	Yes	No	No	No

good humor (noun)	American spelling (noun)
a cheerful and agreeable mood	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')