dichotomization vs dichotomisation

dichotomization and dichotomisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
dichotomization	Yes	No	No	No
dichotomisation	Yes	No	No	No

As nouns, dichotomization and dichotomisation are synonyms defined as:

dichotomization and dichotomisation: the act of dividing into two sharply different categories

dichotomization (noun)	dichotomisation (noun)
the act of dividing into two sharply different categories	the act of dividing into two sharply different categories