Hippo

from WordNet (r) 3.0 (2006)

Hippo
    n 1: an ancient Numidian town in northwestern Africa adjoining
         present-day Annaba in northeastern Algeria [syn: {Hippo},
         {Hippo Regius}]
    2: massive thick-skinned herbivorous animal living in or around
       rivers of tropical Africa [syn: {hippopotamus}, {hippo},
       {river horse}, {Hippopotamus amphibius}]

from The Collaborative International Dictionary of English v.0.48

hippo \hip"po\ n.
   Same as {hippopotamus}.

   Syn: hippopotamus, river horse, Hippopotamus amphibius.
        [WordNet 1.5]

from Moby Thesaurus II by Grady Ward, 1.0

27 Moby Thesaurus words for "hippo":
      Jumbo, blimp, dinosaur, elephant, fatty, hathi, heavy, heavyweight,
      hippopotamus, jumbo, leviathan, lump, mammoth, mastodon, monster,
      pachyderm, potbelly, rhino, rhinoceros, river horse, roly-poly,
      swagbelly, tub, tub of lard, tun, whale, woolly mammoth

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