direct vs level

direct is not a noun while level is a noun.

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

As verbs, level is a hyponym of direct; that is, level is a word with a more specific, narrower meaning than direct:

direct: point or cause to go (blows, weapons, or objects such as photographic equipment) towards
level: direct into a position for use

Other hyponyms of direct include aim, direct, place, point, target, draw a bead on, hold, turn, swing, charge, point, sight.

direct (noun)	level (noun)
	indicator that establishes the horizontal when a bubble is centered in a tube of liquid
	a structure consisting of a room or set of rooms at a single position along a vertical scale
	a flat surface at right angles to a plumb line
	a position on a scale of intensity or amount or quality
	height above ground
	an abstract place usually conceived as having depth
	a specific identifiable position in a continuum or series or especially in a process
	a relative position or degree of value in a graded group

direct (adjective)	level (adjective)
direct in spatial dimensions; proceeding without deviation or interruption; straight and short	of the score in a contest
(of a current) flowing in one direction only	being on a precise horizontal plane
straightforward in means or manner or behavior or language or action	not showing abrupt variations
similar in nature or effect or relation to another quantity	having a surface without slope, tilt in which no part is higher or lower than another
in a straight unbroken line of descent from parent to child	oriented at right angles to the plumb
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)	level (verb)
plan and direct (a complex undertaking)	become level or even
specifically design a product, event, or activity for a certain public	talk frankly with; lay it on the line
command with authority	direct into a position for use
give directions to; point somebody into a certain direction	aim at
put an address on (an envelope)	make level or straight
point or cause to go (blows, weapons, or objects such as photographic equipment) towards	tear down so as to make flat with the ground
intend (something) to move towards a certain goal
guide the actors in (plays and films)
lead, as in the performance of a composition
take somebody somewhere
cause to go somewhere
direct the course; determine the direction of travelling
govern or manage

direct (adverb)	level (adverb)
without deviation