basso vs singer

basso and singer both are nouns.

Word	Noun	Adjective	Verb	Adverb
basso	Yes	No	No	No
singer	Yes	No	No	No

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

Other hypernyms of basso include vocaliser, vocalist, vocalizer.

basso (noun)	singer (noun)
the lowest adult male singing voice	a person who sings
an adult male singer with the lowest voice