instructor

from WordNet (r) 3.0 (2006)

instructor
    n 1: a person whose occupation is teaching [syn: {teacher},
         {instructor}]

from The Collaborative International Dictionary of English v.0.48

Instructor \In*struct"or\, n. [L., a preparer: cf. F.
   instructeur.] [Written also {instructer}.]
   One who instructs; one who imparts knowledge to another; a
   teacher.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

91 Moby Thesaurus words for "instructor":
      Dutch uncle, Polonius, abecedarian, academe, academician,
      admonisher, adviser, aeronaut, aeroplaner, aeroplanist, air pilot,
      airplanist, assistant, assistant professor, associate,
      associate professor, astronaut, aviator, backseat driver,
      barnstormer, birdman, buttinsky, captain, certified teacher,
      cloud seeder, coach, commercial pilot, confidant, consultant,
      copilot, counsel, counselor, crop-duster, docent, doctor, dominie,
      don, educationist, educator, emeritus, expert, fellow, flier,
      forerunner, guide, guru, jet jockey, kibitzer, lecturer,
      licensed pilot, maestro, master, meddler, melamed, mentor,
      mistress, monitor, mullah, nestor, orienter, pandit, pathfinder,
      pedagogist, pedagogue, pilot, preceptist, preceptor,
      preparationist, preparator, preparer, professor,
      professor emeritus, pundit, rabbi, rainmaker, reader,
      retired professor, scholastic, schoolkeeper, schoolmaster,
      schoolteacher, starets, stunt flier, stunt man, teacher,
      test pilot, trailblazer, trainer, tutor, visiting professor,
      wingman