rocket fuel
rocket propellant
rocket propellent

Then there was the rocket fuel that sent rockets in the wrong direction.

He nearly blew up a friend's house trying to make rocket fuel on the stove.

Fortunately, though, fear became the rocket fuel for an idea.

His rocket fuel was exhausted when he hit the ground.

The heavy rocket fuel would give mass to the missiles.

Sure, you can make other stuff, rocket fuel and glass.

Yes, she learned, aluminum could serve as a rocket fuel.

Libya has tried to buy rocket fuel from a Russian concern.

We can use it for life support and to make rocket fuel.

"If there's any drive mechanism, I doubt very much they use rocket fuel."