| Subject | English | French |
| mater.sc. | to clean a firebox | décrasser un foyer |
| mater.sc. | to de-clinker a firebox | décrasser un foyer |
| transp., mater.sc. | firebox back sheet | plaque arrière de foyer |
| transp., mater.sc. | firebox casing | enveloppe du foyer |
| transp. | firebox casing | cadre du foyer |
| transp., mater.sc. | firebox front plate | plaque avant de foyer |
| transp., mater.sc. | firebox front sheet | plaque avant de foyer |
| mater.sc. | firebox roof stays | armature de ciel de foyer |
| transp., mater.sc. | firebox side sheet | flanc de foyer |
| transp., mater.sc. | firebox side-plate | plaque latérale de foyer |
| transp., mater.sc. | firebox throat plate | plaque avant de foyer |
| transp., mater.sc. | firebox throat sheet | plaque avant de foyer |
| mater.sc., mech.eng. | firebox-tube plate | plaque tubulaire de foyer |
| transp. | locomotive without firebox | locomotive sans foyer |
| transp., mech.eng. | outer firebox | boîte à feu |