bass voice vs basso

bass voice and basso both are nouns.

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

As nouns, bass voice and basso are synonyms defined as:

Other synonyms of bass voice include bass.

bass voice (noun)	basso (noun)
the lowest adult male singing voice	the lowest adult male singing voice
	an adult male singer with the lowest voice