direct vs train

direct is not a noun while train is a noun.

Word	Noun	Adjective	Verb	Adverb
direct	No	Yes	Yes	Yes
train	Yes	No	Yes	No

As verbs, direct and train are synonyms defined as:

direct and train: point or cause to go (blows, weapons, or objects such as photographic equipment) towards

Other synonyms of direct include aim, take, take aim.

As verbs, train is a hypernym of direct; that is, train is a word with a broader meaning than direct:

direct: intend (something) to move towards a certain goal
train: point or cause to go (blows, weapons, or objects such as photographic equipment) towards

Other hypernyms of direct include aim, direct, take, take aim.

direct (noun)	train (noun)
	public transport provided by a line of railway cars coupled together and drawn by a locomotive
	wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed
	piece of cloth forming the long back section of a gown that is drawn along the floor
	a series of consequences wrought by an event
	a procession (of wagons or mules or camels) traveling together in single file
	a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding

direct (adjective)	train (adjective)
direct in spatial dimensions; proceeding without deviation or interruption; straight and short
(of a current) flowing in one direction only
straightforward in means or manner or behavior or language or action
similar in nature or effect or relation to another quantity
in a straight unbroken line of descent from parent to child
moving from west to east on the celestial sphere; or--for planets--around the sun in the same direction as the Earth
lacking compromising or mitigating elements
in precisely the same words used by a writer or speaker
having no intervening persons, agents, conditions
being an immediate result or consequence

direct (verb)	train (verb)
plan and direct (a complex undertaking)	exercise in order to prepare for an event or competition
specifically design a product, event, or activity for a certain public	undergo training or instruction in preparation for a particular role, function, or profession
command with authority	create by training and teaching
give directions to; point somebody into a certain direction	teach and supervise (someone); act as a trainer or coach (to), as in sports
put an address on (an envelope)	point or cause to go (blows, weapons, or objects such as photographic equipment) towards
point or cause to go (blows, weapons, or objects such as photographic equipment) towards	drag loosely along a surface; allow to sweep the ground
intend (something) to move towards a certain goal	travel by rail or train
guide the actors in (plays and films)	educate for a future role or function
lead, as in the performance of a composition	teach or refine to be discriminative in taste or judgment
take somebody somewhere	develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control
cause to go somewhere	cause to grow in a certain way by tying and pruning it
direct the course; determine the direction of travelling
govern or manage

direct (adverb)	train (adverb)
without deviation