American spelling vs home theater

American spelling and home theater both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
home theater	Yes	No	No	No

American spelling (noun)	home theater (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	television and video equipment designed to reproduce in the home the experience of being in a movie theater