factorisation vs British spelling

factorisation and British spelling both are nouns.

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

factorisation (noun)	British spelling (noun)
(mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')