blockhead

from WordNet (r) 3.0 (2006)
blockhead
    n 1: a stupid person; these words are used to express a low
         opinion of someone's intelligence [syn: {dunce},
         {dunderhead}, {numskull}, {blockhead}, {bonehead},
         {lunkhead}, {hammerhead}, {knucklehead}, {loggerhead},
         {muttonhead}, {shithead}, {dumbass}, {fuckhead}]
    
from The Collaborative International Dictionary of English v.0.48
Blockhead \Block"head`\, n. [Block + head.]
   A stupid fellow; a dolt; a person deficient in understanding.
   [1913 Webster]

         The bookful blockhead, ignorantly read,
         With loads of learned lumber in his head. --Pope.
   [1913 Webster]
    
from Moby Thesaurus II by Grady Ward, 1.0
67 Moby Thesaurus words for "blockhead":
      addlebrain, addlehead, addlepate, beefhead, blubberhead, blunderer,
      blunderhead, bonehead, boor, botcher, bufflehead, bumbler, bungler,
      cabbagehead, chowderhead, chucklehead, clod, clodhead, clodhopper,
      clodknocker, clodpate, clodpoll, clot, clown, dimwit, dolt,
      dolthead, dullhead, dumbbell, dumbhead, dummy, dunderhead,
      dunderpate, fathead, fumbler, gawk, gowk, jolterhead, jughead,
      klutz, knucklehead, looby, lout, lubber, lunkhead, meathead,
      muddlehead, mushhead, muttonhead, nitwit, noodlehead, numskull,
      oaf, ox, peabrain, pinbrain, pinhead, puddinghead, pumpkin head,
      puzzlehead, slouch, slubberer, stupidhead, thickhead, thickskull,
      tottyhead, yokel

    

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