dichotomisation vs British spelling

dichotomisation and British spelling both are nouns.

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

dichotomisation (noun)	British spelling (noun)
the act of dividing into two sharply different categories	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')