inquirer

from WordNet (r) 3.0 (2006)

inquirer
    n 1: someone who asks a question [syn: {inquirer}, {enquirer},
         {questioner}, {querier}, {asker}]

from The Collaborative International Dictionary of English v.0.48

Inquirer \In*quir"er\, n. [Written also enquirer.]
   One who inquires or examines; questioner; investigator.
   --Locke.
   [1913 Webster]

         Expert inquirers after truth.            --Cowper.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

54 Moby Thesaurus words for "inquirer":
      Paul Pry, Peeping Tom, asker, auditor, autodidact, busybody,
      catechist, cross-interrogator, cross-questioner, detective,
      eavesdropper, educatee, examiner, gossip, inquisitionist,
      inquisitive, inquisitor, interlocutor, interpellator, interrogator,
      interrogatrix, interviewer, learner, monitor, nosy Parker,
      opinion-sampler, poller, pollster, praepostor, prefect, prober,
      pry, pupil, querier, querist, questioner, questionist, quidnunc,
      quizzer, rubberneck, rubbernecker, sampler, scholar, scopophiliac,
      secret agent, self-taught person, sightseer, snoop, snooper,
      student, studier, trainee, voyeur, yenta