slide down vs slide

slide down is not a noun while slide is a noun.

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

slide down (noun)	slide (noun)
	the act of moving smoothly along a surface while remaining in contact with it
	sloping channel through which things can descend
	a transparency mounted in a frame; viewed with a slide projector
	a small flat rectangular piece of glass on which specimens can be mounted for microscopic study
	plaything consisting of a sloping chute down which children can slide
	(music) rapid sliding up or down the musical scale
	(geology) the descent of a large mass of earth or rocks or snow etc.

slide down (verb)	slide (verb)
fall or sink heavily	to pass or move unobtrusively or smoothly
	move obliquely or sideways, usually in an uncontrolled manner
	move smoothly along a surface