pull down vs pull

pull down is not a noun while pull is a noun.

Word	Noun	Adjective	Verb	Adverb
pull down	No	No	Yes	No
pull	Yes	No	Yes	No

pull down (noun)	pull (noun)
	the act of pulling; applying force to move something toward or with you
	a slow inhalation (as of tobacco smoke)
	a sustained effort
	a device used for pulling something
	special advantage or influence
	the force used in pulling
	a sharp strain on muscles or ligaments

pull down (verb)	pull (verb)
cause to come or go down	strain abnormally
tear down so as to make flat with the ground	take away
	take sides with; align oneself with; show strong sympathy for
	cause to move by pulling
	tear or be torn violently
	direct toward itself or oneself by means of some psychological power or physical attributes
	hit in the direction that the player is facing when carrying through the swing
	apply force so as to cause motion towards the source of the motion
	strip of feathers
	remove, usually with some force or effort; also used in an abstract sense
	steer into a certain direction
	move into a certain direction
	operate when rowing a boat
	bring, take, or pull out of a container or from under a cover
	rein in to keep from winning a race
	cause to move in a certain direction by exerting a force upon, either physically or in an abstract sense
	perform an act, usually with a negative connotation