systematiser vs arranger

systematiser and arranger both are nouns.

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

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

Other hypernyms of systematiser include organiser, organizer.

systematiser (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