The Collaborative International Dictionary of English v.0.48:

Hookah \Hook"ah\ (h[oo^]k"[.a]), n. [Per. or Ar. huqqa a round
   box or casket, a bottle through which the fumes pass when
   smoking tobacco.]
   A pipe with a long, flexible stem, so arranged that the smoke
   is cooled by being made to pass through water. Also called
   narghile and water pipe. The hubble-bubble is a simple
   form of this device.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

hookah
    n 1: an oriental tobacco pipe with a long flexible tube
         connected to a container where the smoke is cooled by
         passing through water; "a bipolar world with the hookah and
         Turkish coffee versus hamburgers and Coca Cola" [syn:
         hookah, narghile, nargileh, sheesha, shisha,
         chicha, calean, kalian, water pipe, hubble-
         bubble, hubbly-bubbly]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "hookah":
   Missouri meerschaum, briar, briar pipe, calean, calumet,
   churchwarden, clay, corncob, corncob pipe, hubble-bubble,
   meerschaum, nargileh, peace pipe, pipe, pipe cleaner, pipe rack,
   tobacco pipe, tobacco pouch, water pipe