American spelling vs sun parlor

American spelling and sun parlor both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
sun parlor	Yes	No	No	No

American spelling (noun)	sun parlor (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	a room enclosed largely with glass and affording exposure to the sun