basso profundo vs bass voice

basso profundo and bass voice both are nouns.

Word	Noun	Adjective	Verb	Adverb
basso profundo	Yes	No	No	No
bass voice	Yes	No	No	No

As nouns, bass voice is a hypernym of basso profundo; that is, bass voice is a word with a broader meaning than basso profundo:

Other hypernyms of basso profundo include bass, basso.

basso profundo (noun)	bass voice (noun)
a very deep bass voice	the lowest adult male singing voice