authorise vs British spelling

authorise is not a noun while British spelling is a noun.

Word	Noun	Adjective	Verb	Adverb
authorise	No	No	Yes	No
British spelling	Yes	No	No	No

authorise (noun)	British spelling (noun)
	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')

authorise (verb)	British spelling (verb)
grant authorization or clearance for
give or delegate power or authority to