The Collaborative International Dictionary of English v.0.48:

questionnaire \ques`tion`naire"\, n.; pl. -naires (F. ?). [F.]
   1. same as Questionary.
      [Webster 1913 Suppl.]

   2. A list of questions, usually on a printed form, to be
      answered by an individual. The forms often have blank
      spaces in which the answers can be written. Sets of such
      forms are distributed to groups and the answers used for
      various purposes, such as to obtain statistical
      information for social science, political, or marketing
      research, or to obtain information about a patient for the
      use of medical practitioners.
      [PJC]

WordNet (r) 3.0 (2006):

questionnaire
    n 1: a form containing a set of questions; submitted to people
         to gain statistical information

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "questionnaire":
   agenda, beadroll, cadastre, calendar, canvass, census,
   census report, checklist, checkroll, conduct a poll,
   consumer research, consumer-preference survey, docket,
   dramatis personae, head count, honor roll, inquiry, jury list,
   jury panel, lineup, make a survey, muster, muster roll, nose count,
   opinion poll, order of business, poll, program, property roll,
   public-opinion poll, questionary, returns, roll, roll call, roster,
   rota, sample, scroll, survey, tax roll