trio vs musical group

trio and musical group both are nouns.

Word	Noun	Adjective	Verb	Adverb
trio	Yes	No	No	No
musical group	Yes	No	No	No

As nouns, musical group is a hypernym of trio; that is, musical group is a word with a broader meaning than trio:

Other hypernyms of trio include musical organisation, musical organization.

trio (noun)	musical group (noun)
a musical composition for three performers	an organization of musicians who perform together
three people considered as a unit
a set of three similar things considered as a unit
three performers or singers who perform together
the cardinal number that is the sum of one and one and one