roll over vs roll

roll over is not a noun while roll is a noun.

Word	Noun	Adjective	Verb	Adverb
roll over	No	No	Yes	No
roll	Yes	No	Yes	No

roll over (noun)	roll (noun)
	a flight maneuver; aircraft rotates about its longitudinal axis without changing direction or losing altitude
	the act of rolling something (as the ball in bowling)
	the act of throwing dice
	walking with a swaying gait
	anything rolled up in cylindrical form
	photographic film rolled up inside a container to protect it from light
	a list of names
	a document that can be rolled up (as for storage)
	a deep prolonged sound (as of thunder or large bells)
	a long heavy sea wave as it advances towards the shore
	rotary motion of an object around its own axis
	the sound of a drum (especially a snare drum) beaten rapidly and continuously
	small rounded bread either plain or sweet
	a roll of currency notes (often taken as the resources of a person or business etc.)
	a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

roll over (verb)	roll (verb)
make a rolling motion or turn	execute a roll, in tumbling
re-invest (a previous investment) into a similar fund or security	take the shape of a roll or cylinder
negociate to repay a loan at a later date for an additional fee	show certain properties when being rolled
	boil vigorously
	shape by rolling
	pronounce with a roll, of the phoneme /r/
	arrange or coil around
	begin operating or running
	flatten or spread with a roller
	move by turning over or rotating
	move along on or as if on wheels or a wheeled vehicle
	move about aimlessly or without any destination, often in search of food or employment
	move in a wavy pattern or with a rising and falling motion
	cause to move by turning over or in a circular manner of as if on an axis
	move, rock, or sway from side to side
	emit, produce, or utter with a deep prolonged reverberating sound
	sell something to or obtain something from by energetic and especially underhanded activity
	occur in soft rounded shapes