Inquisitor

Noun

 * 1) A person who inquires, especially searchingly or ruthlessly.
 * 2) An official of the ecclesiastical court of the Inquisition.

Derived terms

 * Grand Inquisitor

Thesaurus
Paul Pry, Peeping Tom, asker, busybody, catechist, cross-interrogator, cross-questioner, detective, eavesdropper, examiner, gossip, inquirer, inquisitionist, inquisitive, interlocutor, interpellator, interrogator, interrogatrix, interviewer, nosy Parker, opinion-sampler, poller, pollster, prober, pry, querier, querist, questioner, questionist, quidnunc, quizzer, rubberneck, rubbernecker, sampler, scopophiliac, secret agent, sightseer, snoop, snooper, voyeur, yenta

Noun

 * 1) searcher
 * 2) inquisitor, tracker, detective, spy
 * 3) examiner, investigator