systemiser vs arranger

systemiser and arranger both are nouns.

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

As nouns, arranger is a hypernym of systemiser; that is, arranger is a word with a broader meaning than systemiser:

Other hypernyms of systemiser include organiser, organizer.

systemiser (noun)	arranger (noun)
an organizer who puts things in order	a person who brings order and organization to an enterprise
	a musician who adapts a composition for particular voices or instruments or for another style of performance