Hydrant \Hy"drant\, n. [Gr. ? to irrigate, fr. "y`dwr water. See Hydra.]

A discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks; a water plug. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

37 Moby Thesaurus words for "hydrant": Foamite, acid, automatic sprinkler, carbon tet, carbon tetrachloride, carbon-dioxide foam, cock, deck gun, deluge set, extinguisher, fire apparatus, fire engine, fire hose, fire hydrant, fireplug, foam, foam extinguisher, gate, hook-and-ladder, ladder pipe, petcock, plug, pumper, snorkel, soda, spigot, sprinkler, sprinkler head, sprinkler system, stopcock, super-pumper, tap, valve, water, water cannon, water plug, wet blanket

Source: Moby Thesaurus II by Grady Ward, 1.0
 

hydrant

Source: WordNet (r) 2.0
 

Hydrant \Hy"drant\, n. [Gr. ? to irrigate, fr. "y`dwr water. See Hydra.]

A discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks; a water plug.

Source: Webster's Revised Unabridged Dictionary (1913)