The Collaborative International Dictionary of English v.0.48:

Stokehold \Stoke"hold`\, n. (Naut.)
   The space, or any of the spaces, in front of the boilers of a
   ship, from which the furnaces are fed; the stokehole of a
   ship; also, a room containing a ship's boilers; as, forced
   draft with closed stokehold; -- called also, in American
   ships, fireroom.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Fireroom \Fire"room`\, n.
   Same as Stokehold, below.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

fireroom
    n 1: (nautical) chamber or compartment in which the furnaces of
         a ship are stoked or fired [syn: stokehold, stokehole,
         fireroom]