British spelling vs popularise

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

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

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

British spelling (verb)	popularise (verb)
	make understandable to the general public
	cater to popular taste to make popular and present to the general public; bring into general or common use