Power plant and Power train

Power plant noun - An electrical generating station.

Power train and power plant are semantically related In some cases you can use "Power train" instead a noun phrase "Power plant".

Power train noun - Wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed.

Power plant and power train are semantically related in device that drives a machine topic. You can use "Power plant" instead a noun phrase "Power train".