watercolour vs Australian spelling

watercolour and Australian spelling both are nouns.

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

watercolour (noun)	Australian spelling (noun)
the art or technique of painting with watercolors	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')
a painting produced with watercolors
a water-base paint (with water-soluble pigments); used by artists
water-soluble pigment

watercolour (verb)	Australian spelling (verb)
paint with watercolors