hammerhead vs lunkhead what difference

what is difference between hammerhead and lunkhead




hammer +‎ head



hammerhead (plural hammerheads)

  1. The portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).
  2. (zoology) Any of various sharks of the genera Sphyrna or Zygaena having the eyes set on projections from the sides of the head, which gives it a hammer shape.
  3. (zoology) A fresh-water fish; the hogsucker, Hypentelium nigricans, in the sucker family Catostomidae.
  4. (zoology) An African fruit bat, the hammer-headed fruit bat, Hypsignathus monstrosus, so called from its large blunt nozzle.
  5. (slang) A stupid person, a dunce.
    • 1960, P. G. Wodehouse, Jeeves in the Offing, chapter V:
      [The butler] joined us with a telegram for Bobbie on a salver. From her mother, I presumed, calling me some name which she had forgotten to insert in previous communications. Or, of course, possibly expressing once more her conviction that I was a guffin, which, I thought, having had time to ponder over it, would be something in the nature of a bohunkus or a hammerhead.
  6. A turn-around; a parking area constructed in a subdivision for initial access and construction.
  7. (biology) A kind of ribozyme; hammerhead ribozyme.


  • (shark): hammerhead shark, hammer fish, balance fish




Probably from *lunk (perhaps an alteration of lump; compare hunk & hump), a diminutive of lump +‎ head.


lunkhead (plural lunkheads)

  1. (derogatory, informal) A fool or idiot.
    Synonyms: see Thesaurus:idiot

See also

  • dunderhead
  • lunk
  • meathead

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