.38 calibre vs Australian spelling

.38 calibre is not a noun while Australian spelling is a noun.

Word	Noun	Adjective	Verb	Adverb
.38 calibre	No	Yes	No	No
Australian spelling	Yes	No	No	No

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

.38 calibre (adjective)	Australian spelling (adjective)
of or relating to the bore of a gun (or its ammunition) that measures thirty-eight hundredths of an inch in diameter