bell ringer vs instrumentalist

bell ringer and instrumentalist both are nouns.

Word	Noun	Adjective	Verb	Adverb
bell ringer	Yes	No	No	No
instrumentalist	Yes	No	No	No

As nouns, instrumentalist is a hypernym of bell ringer; that is, instrumentalist is a word with a broader meaning than bell ringer:

Other hypernyms of bell ringer include musician, player.

bell ringer (noun)	instrumentalist (noun)
something that exactly succeeds in achieving its goal	someone who plays a music as a profession
someone who plays musical handbells
a person who rings church bells (as for summoning the congregation)