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]

The Collaborative International Dictionary of English v.0.48:

Nargile \Nar"gile\, Nargileh \Nar"gi*leh\, n. [Per.
   n[=a]rgh[imac]l, prop., a cocoanut; prob. so called because
   first made of a cocoanut.]
   An apparatus for smoking tobacco. It has a long flexible
   tube, and the smoke is drawn through water. Also called
   hoookah and water pipe. Functionally similar to the
   hubble-bubble, a simplified form.
   [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

Water pipe \Wa"ter pipe\
   A pipe for conveying water.
   [1913 Webster]

WordNet (r) 3.0 (2006):

water pipe
    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]