The Collaborative International Dictionary of English v.0.48:

Nous \Nous\, n. [NL., fr. Gr. noy^s mind.]
   1. Intellect; understanding; talent; -- used humorously.
      [1913 Webster]

   2. (Philos.) The reason; the highest intellect; God regarded
      as the World Reason.
      [Webster 1913 Suppl.] Nousel

WordNet (r) 3.0 (2006):

nous
    n 1: common sense; "she has great social nous"
    2: that which is responsible for one's thoughts and feelings;
       the seat of the faculty of reason; "his mind wandered"; "I
       couldn't get his words out of my head" [syn: mind, head,
       brain, psyche, nous]

Moby Thesaurus II by Grady Ward, 1.0:

75 Moby Thesaurus words for "nous":
   Logos, Vernunft, World Reason, acuity, acuteness, adroitness,
   anima mundi, aptitude, aptness, archeus, brain, braininess, brains,
   brightness, brilliance, clear thinking, cleverness, conception,
   dexterity, discourse of reason, discursive reason, esprit, flair,
   genius, giftedness, gifts, gray matter, head, headpiece,
   infinite spirit, intellect, intellection, intellectual faculty,
   intelligence, keen-wittedness, keenness, mens, mental alertness,
   mental capacity, mentality, mercurial mind, mind,
   native cleverness, nimble mind, nimble-wittedness, nimbleness,
   oversoul, power of reason, psyche, quick parts, quick thinking,
   quick wit, quick-wittedness, quickness, ratio, rationality,
   ready wit, reason, reasoning, reasoning faculty, savvy,
   sharp-wittedness, sharpness, smartness, smarts, sprightly wit,
   supreme soul, talent, understanding, universal ego,
   universal life force, world principle, world soul, world spirit,
   world-self