| Answer | Crossword Clue |
|---|---|
| RETRO | Certain rocket engine |
| BOOSTER | Rocket engine |
| RETRO | Rocket engine |
| RETRO | Small rocket engine |
| THRUST | Rocket engine force |
| IONS | Rocket engine discharge, perhaps |
| fireable | nite fire a rocket engine |
| propellant | A substance used as a reagent in a rocket engine to provide thrust |
| propellants | A substance used as a reagent in a rocket engine to provide thrust |
| burnout | the point at which a rocket engine stops because it runs out of fuel |
| thrusters | A small rocket engine on a spacecraft, used to make alterations in its flight path or altitude |
