Australian spelling vs encyclopaedia

Australian spelling and encyclopaedia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
encyclopaedia	Yes	No	No	No

Australian spelling (noun)	encyclopaedia (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty