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As for German, there isn't really an equivalent for engine, even combustion engines are called (Verbrennungs)Motor.

Rocket and jet engines are sometimes called Raketentriebwerk and Turbinentriebwerk respectively.

But this has the meaning of something providing propulsion.

A steam engine is called Dampfmaschine (steam machine), though more recent designs are called Dampfmotor (steam motor) instead.