quantisation vs British spelling

quantisation and British spelling both are nouns.

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

quantisation (noun)	British spelling (noun)
the act of dividing into quanta or expressing in terms of quantum theory	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')