Australian spelling vs operating theatre

Australian spelling and operating theatre both are nouns.

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

Australian spelling (noun)	operating theatre (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	a room in a hospital equipped for the performance of surgical operations