ill humour vs Australian spelling

ill humour and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
ill humour	Yes	No	No	No
Australian spelling	Yes	No	No	No

ill humour (noun)	Australian spelling (noun)
an angry and disagreeable mood	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')