systematist vs arranger

systematist and arranger both are nouns.

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

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

Other hypernyms of systematist include organiser, organizer.

systematist (noun)	arranger (noun)
a biologist who specializes in the classification of organisms into groups on the basis of their structure and origin and behavior	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