British spelling vs maximisation

British spelling and maximisation both are nouns.

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

British spelling (noun)	maximisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the act of raising to the highest possible point or condition or position