systemiser vs systemizer

systemiser and systemizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
systemiser	Yes	No	No	No
systemizer	Yes	No	No	No

As nouns, systemiser and systemizer are synonyms defined as:

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

systemiser (noun)	systemizer (noun)
an organizer who puts things in order	an organizer who puts things in order