violinist vs instrumentalist

violinist and instrumentalist both are nouns.

Word	Noun	Adjective	Verb	Adverb
violinist	Yes	No	No	No
instrumentalist	Yes	No	No	No

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

Other hypernyms of violinist include musician, player.

violinist (noun)	instrumentalist (noun)
a musician who plays the violin	someone who plays a music as a profession