WordNet (r) 3.0 (2006):

shofar
    n 1: an ancient musical horn made from the horn of a ram; used
         in ancient times by the Israelites to sound a warning or a
         summons; used in synagogues today on solemn occasions [syn:
         shofar, shophar]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "shofar":
   Agnus Dei, Holy Grail, Host, Pieta, Sanctus bell, Sangraal, ark,
   asperger, bambino, beadroll, beads, candle, censer, chaplet,
   ciborium, cross, crucifix, cruet, eucharistial, holy cross,
   holy water, holy-water sprinkler, icon, incensory, matzo, menorah,
   mezuzah, mikvah, monstrance, osculatory, ostensorium,
   paschal candle, pax, phylacteries, prayer shawl, prayer wheel, pyx,
   relics, rood, rosary, sacramental, sacred relics, sacring bell,
   sukkah, tabernacle, tallith, thurible, urceole, veronica,
   vigil light, votive candle