| Answer | Crossword Clue |
|---|---|
| monopropellant | A substance used as rocket fuel without an additional oxidizing agent |
| monopropellants | A substance used as rocket fuel without an additional oxidizing agent |
| hypergolic | igniting on contact, applied eg to rocket fuel which ignites spontaneously on contact with an oxidizing agent |
| hypergolically | HYPERGOLIC, igniting on contact, applied eg to rocket fuel which ignites spontaneously on contact with an oxidizing agent |
