fire·box 
(fīrbŏks′)
(fīrbŏks′)n.
1. A chamber, such as the furnace of a steam locomotive, in which fuel is burned.
2. A box containing a fire alarm.
- protocolar
- protocolary
- protoctist
- protoderm
- protodermal
- protogalaxy
- Proto-Germanic
- protogynous
- protogyny
- protohistorian
- protohistoric
- protohistory
- protohuman
- Proto-Indo-European
- protolanguage
- protolithic
- protomartyr
- protomorph
- protomorphic
- proton
- protonema
- protonemal
- protonematal
- protonic
- protonotary