home theatre vs Australian spelling

home theatre and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
home theatre	Yes	No	No	No
Australian spelling	Yes	No	No	No

home theatre (noun)	Australian spelling (noun)
television and video equipment designed to reproduce in the home the experience of being in a movie theater	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')