WordNet (r) 3.0 (2006):

fireguard
    n 1: a narrow field that has been cleared to check the spread of
         a prairie fire or forest fire [syn: firebreak,
         fireguard]
    2: a metal screen before an open fire for protection (especially
       against flying sparks) [syn: fire screen, fireguard]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "fireguard":
   Argus, Charley, airplane spotter, chimney, chimney corner, fender,
   fire patrolman, fire screen, fire warden, fireboard, fireplace,
   fireside, flue, forward observer, hearth, hearthstone, hob, hub,
   ingle, inglenook, ingleside, lookout, lookout man, night watchman,
   patrol, patroller, patrolman, picket, roundsman, scout, sentinel,
   sentry, smokehole, spotter, vedette, watch, watcher, watchkeeper,
   watchman