[1] : The Collaborative International Dictionary of English v.0.48

nut \nut\ nu^t, n. oe. nute, note, as. hnutu; akin to d.
   noot, g. nuss, ohg. nuz, icel. hnot, sw. n"ot, dan.
   n"od.
   1913 webster
   1. bot. the fruit of certain trees and shrubs as of the
      almond, walnut, hickory, beech, filbert, etc., consisting
      of a hard and indehiscent shell inclosing a kernel.
      1913 webster

   2. a perforated block usually a small piece of metal,
      provided with an internal or female screw thread, used on
      a bolt, or screw, for tightening or holding something, or
      for transmitting motion. see illust. of 1st bolt.
      1913 webster

   3. the tumbler of a gunlock. --knight.
      1913 webster

   4. naut. a projection on each side of the shank of an
      anchor, to secure the stock in place.
      1913 webster

   5. pl. testicles. vulgar slang
      pjc

   check nut, jam nut, lock nut, a nut which is screwed up
      tightly against another nut on the same bolt or screw, in
      order to prevent accidental unscrewing of the first nut.
      

   nut buoy. see under buoy.

   nut coal, screened coal of a size smaller than stove coal
      and larger than pea coal; -- called also chestnut coal.
      

   nut crab zool., any leucosoid crab of the genus ebalia
      as, ebalia tuberosa of europe.

   nut grass bot., see nut grass in the vocabulary.

   nut lock, a device, as a metal plate bent up at the
      corners, to prevent a nut from becoming unscrewed, as by
      jarring.

   nut pine. bot. see under pine.

   nut rush bot., a genus of cyperaceous plants scleria
      having a hard bony achene. several species are found in
      the united states and many more in tropical regions.

   nut tree, a tree that bears nuts.

   nut weevil zool., any species of weevils of the genus
      balaninus and other allied genera, which in the larval
      state live in nuts.
      1913 webster
see also:
bolt check nut jam nut lock nut nut buoy buoy 
nut coal chestnut coal nut crab ebalia ebalia tuberosa 
nut grass nut grass nut lock nut pine pine 
nut rush scleria nut tree nut weevil balaninus 

[2] : The Collaborative International Dictionary of English v.0.48

nut \nut\, v. i. imp.  p. p. nutted; p. pr.  vb. n.
   nutting.
   to gather nuts.
   1913 webster
see also:
nutted nutting 

[3] : WordNet (r) 2.0

nut
     n 1: usually large hard-shelled seed
     2: egyptian goddess of the sky
     3: a small usually square or hexagonal metal block with
        internal screw thread to be fitted onto a bolt
     4: half the width of an em syn: en
     5: a whimsically eccentric person syn: crackpot, crank, nut
        case, nutcase, fruitcake, screwball
     6: someone who is so ardently devoted to something that it
        resembles an addiction; "a golf addict"; "a car nut"; "a
        news junkie" syn: addict, freak, junkie, junky
     7: one of the two male reproductive glands that produce
        spermatozoa and secrete androgens; "she kicked him in the
        balls and got away" syn: testis, testicle, orchis,
        ball, ballock, bollock, egg
     v : gather nuts
     also: nutting, nutted
see also:
en crackpot crank nut case nutcase fruitcake 
screwball addict freak junkie junky 
testis testicle orchis ball ballock 
bollock egg nutting nutted 

[4] : Moby Thesaurus II by Grady Ward, 1.0

184 moby thesaurus words for "nut":
   brazil nut, english walnut, macadamia nut, acorn, addict,
   aficionado, alien, aliene, almond, almond paste, amande,
   amande douce, amandes mondees, amateur, authority, bean, bedlamite,
   beechnut, ben nut, berry, betel nut, bigot, bird seed,
   bitter almond, black walnut, blanched almonds, bonduc nut,
   borderline case, bring in, buff, bug, burnt almond, butternut,
   candlenut, case, cashew, cashew nut, character, chestnut,
   chinquapin, cobnut, coconut, collector, conk, connoisseur,
   corozo nut, crackbrain, crackpot, crank, critic, crop, crop herbs,
   cuckoo, cumara nut, cut, dement, demon, demoniac, devotee, dig,
   dika nut, dilettante, ding-a-ling, dome, eager beaver, eccentric,
   energumen, enthusiast, erratic, expert, faddist, fan, fanatic,
   fanatico, fiend, flake, flaxseed, fou, freak, fruit, gather,
   gather in, glean, goober, goober pea, grabble, grain,
   great one for, ground-pea, groundnut, harebrain, harvest, hay,
   hayseed, head, hermit, hickory nut, hobbyist, hobo, horse chestnut,
   hound, idiot, infatuate, issue, kernel, kola, kola nut, kook,
   linseed, litchi nut, lone wolf, loner, loon, loony, lunatic,
   lunatic fringe, madman, maniac, maverick, meat, meshuggenah,
   monomaniac, mow, natural, nigger toe, noddle, noggin, noisette,
   noix, non compos, noncompos, nonconformist, noodle, odd fellow,
   oddball, oddity, original, outsider, palm nut, pariah, peanut,
   peanut butter, pecan, phrenetic, pick, pine nut, pip, pistachio,
   pit, pluck, poll, pundit, pursuer, queer duck, queer fish,
   queer specimen, question, rara avis, raving lunatic, reap,
   reap and carry, recluse, rhapsodist, salted peanuts, sassafras nut,
   savant, scholar, screwball, seed, solitary, souari nut, specialist,
   stone, strange duck, sucker for, sweet almond, technical expert,
   technician, tramp, type, visionary, walnut, weirdo, zealot

Cola Nut >> C Words
Cola Nut, definition of term: Cola Nut
cola+nut_pag1.html

Cashew Nut >> C Words
Cashew Nut, definition of term: Cashew Nut
cashew+nut_pag1.html

Brazil Nut >> B Words
Brazil Nut, definition of term: Brazil Nut
brazil+nut_pag1.html

Betel Nut >> B Words
Betel Nut, definition of term: Betel Nut
betel+nut_pag1.html

Bolt And Nut >> B Words
Bolt And Nut, definition of term: Bolt And Nut
bolt+and+nut_pag1.html