Nouns

(n)sopranoa female singer with the highest vocal range of all the voice type
(n)sopranothe highest female voice; the voice of a boy before puberty
(n)soprano, treblethe pitch range of the highest female voice

Adjectives

(s)soprano, treblehaving or denoting a high range“soprano voice”, “soprano sax”, “the boy still had a fine treble voice”, “the treble clef”