Donkey-engine and Donkey engine

Donkey engine and donkey-engine are semantically related. In some cases you can use "Donkey engine" instead a noun phrase "Donkey-engine".

Donkey engine noun - A locomotive for switching rolling stock in a railroad yard.

Donkey-engine and donkey engine are semantically related. Sometimes you can replace phrase "Donkey-engine" with "Donkey engine", this phrases are similar.