British spelling vs categorise

British spelling is a noun but categorise is not a noun.

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

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

British spelling (verb)	categorise (verb)
	place into or assign to a category