The term 'contralto' is a type of singing voice that is the lowest female vocal range. It is sometimes referred to as an ALTO, which is a four-letter word in the crossword. Mezzo-soprano is another five-letter word in the crossword and is a type of female singing voice that is slightly higher than contralto. The name ANDERSON is an eight-letter word in the crossword and is likely referring to the contralto singer, Marian ANDERSON, who was the first African American to perform at the Metropolitan Opera in New York City. BASS is a four-letter word in the crossword and is a type of male singing voice that is lower than contralto. BASSO is a five-letter word in the crossword and is another term for BASS.