| Answer | Crossword Clue |
|---|---|
| insulator | A thing or substance used for insulation, in particular |
| insulators | A thing or substance used for insulation, in particular |
| sleepers | A thing used for or connected with sleeping, in particular |
| sleeper | A thing used for or connected with sleeping, in particular |
| propellants | A thing or substance that causes something to move or be driven forward or outward, in particular |
| propellant | A thing or substance that causes something to move or be driven forward or outward, in particular |
