British spelling vs modernise

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

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

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

British spelling (verb)	modernise (verb)
	make repairs, renovations, revisions or adjustments to
	become technologically advanced