WordNet (r) 3.0 (2006):

vibes
    n 1: a percussion instrument similar to a xylophone but having
         metal bars and rotating disks in the resonators that
         produce a vibrato sound [syn: vibraphone, vibraharp,
         vibes]

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "vibes":
   battery, bells, bones, caring, castanets, celesta, chime, chimes,
   chord, clappers, concern, crash cymbal, cymbals, echo, empathy,
   feelings, fellow feeling, finger cymbals, gamelan, glockenspiel,
   gong, handbells, identification, idiophone, involvement, lyra,
   maraca, marimba, metallophone, orchestral bells, pathos,
   percussion, percussion instrument, percussions, percussive,
   rapport, rattle, rattlebones, relating, resonances, response,
   responsiveness, sensations, sharing, sizzler, snappers,
   sympathetic chord, sympathetic response, sympathy, tam-tam,
   tintinnabula, tonitruone, triangle, tubular bells, vibraphone,
   vibrations, xylophone