plagiarise vs British spelling

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

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

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

plagiarise (verb)	British spelling (verb)
take without referencing from someone else's writing or speech; of intellectual property