pasteurise vs British spelling

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

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

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

pasteurise (verb)	British spelling (verb)
heat food in order to kill harmful microorganisms