different between trainset vs trainest

English

train +? set

trainset (plural trainsets)

A locomotive and carriages coupled together to form a unified set of equipment.
a self-propelled electric or diesel multiple unit, consisting of a fixed number of permanently coupled passenger vehicles.

intraset, intreats, nitrates, rantiest, straiten, tainters, tartines, tertians, trainest

train +? -est

trainest

intraset, intreats, nitrates, rantiest, straiten, tainters, tartines, tertians, train set, trainset

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