lacklustre vs Australian spelling

lacklustre is not a noun while Australian spelling is a noun.

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

lacklustre (noun)	Australian spelling (noun)
	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

lacklustre (adjective)	Australian spelling (adjective)
lacking luster or shine
lacking brilliance or vitality