27 Moby Thesaurus words for "witch hunt":
   McCarthyism, amassing evidence, close inquiry,
   department of investigation, detection, detective work,
   exhaustive study, harassment, harrying, hearing, hounding,
   indagation, investigation, investigative bureau,
   legislative investigation, legwork, oppression, perscrutation,
   persecution, probe, red-baiting, research, sifting, sleuthing,
   tormenting, victimization, witch-hunting