| Answer | Crossword Clue |
|---|---|
| TAR | Kind of oil or sand |
| synfuel | a liquid or gaseous fuel derived especially from a fossil fuel that is a solid (as coal) or part of a solid (as tar sand or oil shale) |
| proppant | sand or similar, used to keep fissures in an oil-bed open |
| proppants | PROPPANT, sand or similar, used to keep fissures in an oil-bed open |
| LINSEED | Kind of oil or cake |
| OLIVE | Kind of oil or branch |
| SNAKE | Kind of oil or pit |
| COAL | Kind of gas or oil |
| TUNG | Kind of tree or oil |
