trains

public transport provided by a line of railway cars coupled together and drawn by a locomotive;

a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding;
a procession (of wagons or mules or camels) traveling together in single file;
a series of consequences wrought by an event;
piece of cloth forming the long back section of a gown that is drawn along the floor;
wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed;
create by training and teaching;
undergo training or instruction in preparation for a particular role, function, or profession;
develop (children's) behavior by instruction and practice; especially to teach self-control;
educate for a future role or function;
teach or refine to be discriminative in taste or judgment;
point or cause to go (blows, weapons, or objects such as photographic equipment) towards;
teach and supervise (someone); act as a trainer or coach (to), as in sports;
exercise in order to prepare for an event or competition;
cause to grow in a certain way by tying and pruning it;
travel by rail or train;
drag loosely along a surface; allow to sweep the ground;

trains is a valid Scrabble (US) TWL word

trains is a valid Scrabble Word in Merriam-Webster MW Dictionary

trains is a valid Scrabble Word in International Collins CSW Dictionary

trains is a valid Words With Friends word