systematizer vs systematiser

systematizer and systematiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
systematizer	Yes	No	No	No
systematiser	Yes	No	No	No

As nouns, systematizer and systematiser are synonyms defined as:

Other synonyms of systematizer include orderer, systematist, systemiser, systemizer.

systematizer (noun)	systematiser (noun)
an organizer who puts things in order	an organizer who puts things in order