| Answer | Crossword Clue |
|---|---|
| COAL | Furnace fuel, sometimes |
| COKE | Furnace fuel |
| COAL | Furnace fuel |
| OIL | Furnace fuel |
| STOKE | Fuel a furnace |
| COKE | Blast-furnace fuel |
| COAL | Old furnace fuel |
| COKE | Blast furnace fuel |
| COKY | +Like some furnace fuel |
| COAL | Old-time furnace fuel |
| COAL | Fuel in an old furnace |
| STOKE | Supply fuel to a furnace |
| COKE | Fuel for a blast furnace |
| COAL | Fuel for an old furnace |
| STOKEUP | Add fuel, as to a furnace |
