letač

1. pilot; aviator
   Moj deda je bio vojni letač. — My grandfather was a military pilot.
   Probni letač je bezbedno spustio avion. — The test pilot landed the plane safely.
2. (of a bird, animal) flyer
   Lasta je odličan letač. — The swallow is an excellent flyer.

In the sense of pilot it appears mainly in set phrases (vojni letač, probni letač); pilot is more common in everyday speech.