British spelling vs maximise

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

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

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

British spelling (verb)	maximise (verb)
	make as big or large as possible
	make the most of