trombone player vs musician

trombone player and musician both are nouns.

Word	Noun	Adjective	Verb	Adverb
trombone player	Yes	No	No	No
musician	Yes	No	No	No

As nouns, musician is a hypernym of trombone player; that is, musician is a word with a broader meaning than trombone player:

Other hypernyms of trombone player include instrumentalist, player.

trombone player (noun)	musician (noun)
a musician who plays the trombone	artist who composes or conducts music as a profession
	someone who plays a music as a profession