arranger vs systemiser

arranger and systemiser both are nouns.

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

As nouns, systemiser is a hyponym of arranger; that is, systemiser is a word with a more specific, narrower meaning than arranger:

Other hyponyms of arranger include co-ordinator, coordinator, orderer, systematiser, systematist, systematizer, systemizer.

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