WordNet (r) 3.0 (2006):

peyote
    n 1: a small spineless globe-shaped cactus; source of mescal
         buttons [syn: mescal, mezcal, peyote, Lophophora
         williamsii]
    2: the hallucinatory alkaloid that is the active agent in mescal
       buttons [syn: mescaline, peyote]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "peyote":
   DET, DMT, LSD, Mary Jane, STP, THC, acid, antidepressant,
   ataractic, diethyltryptamine, dimethyltryptamine, gage, ganja,
   grass, hallucinogen, hash, hashish, hay, hemp, joint, kava,
   marijuana, mescal, mescal bean, mescal button, mescaline,
   mind-altering drug, mind-blowing drug, mind-expanding drug,
   morning glory seeds, pot, psilocin, psilocybin, psychedelic,
   psychic energizer, psychoactive drug, psychochemical,
   psychotomimetic, reefer, roach, stick, tea, tranquilizer, weed