gaol vs Australian spelling

gaol and Australian spelling both are nouns.

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

gaol (noun)	Australian spelling (noun)
a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence)	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

gaol (verb)	Australian spelling (verb)
lock up or confine, in or as in a jail