Ah---

[Luke manages to keep his amusement under control as he shakes his head, though there's a small smile on his face.]

No, they're not. Repulsors, or repulsor lifts or similar, are bits of technology which keep things in the air by sort of pushing away from the ground with the energy they emit.

[Pausing, Luke's smile widens a little.]

One is a thing that keeps things... flying, the other is just a word.