instrumentalist vs pianist

Other hyponyms of instrumentalist include accompanist, accompanyist, accordionist, concertinist, bandsman, bassist, bassoonist, bell ringer, carillonneur, cellist, violoncellist, clarinetist, clarinettist, flautist, flute player, flutist, gambist, guitar player, guitarist, harmoniser, harmonizer, harper, harpist, harpsichordist, hornist, jazz musician, jazzman, keyboardist, koto player, lutanist, lutenist, lutist, oboist, organist, percussionist, piano player, bagpiper, piper, recorder player, rhythm and blues musician, rock 'n' roll musician, rocker, saxist, saxophonist, singer, vocaliser, vocalist, vocalizer, sitar player, soloist, trombone player, trombonist, cornetist, trumpeter, vibist, vibraphonist, fiddler, violinist, violist.