reversal vs reverse

reversal and reverse both are nouns.

Word	Noun	Adjective	Verb	Adverb
reversal	Yes	No	No	No
reverse	Yes	Yes	Yes	No

As nouns, reversal and reverse are synonyms defined as:

Other synonyms of reversal include reversion, turnabout, turnaround.

As nouns, reversal and reverse are synonyms defined as:

reversal and reverse: an unfortunate happening that hinders or impedes; something that is thwarting or frustrating

Other synonyms of reversal include black eye, blow, setback.

reversal (noun)	reverse (noun)
a change from one state to the opposite state	(American football) a running play in which a back running in one direction hands the ball to a back running in the opposite direction
the act of reversing the order or place of	turning in the opposite direction
turning in the opposite direction	the gears by which the motion of a machine can be reversed
a major change in attitude or principle or point of view	the side of a coin or medal that does not bear the principal design
a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside	an unfortunate happening that hinders or impedes; something that is thwarting or frustrating
a decision to reverse an earlier decision	a relation of direct opposition
turning in an opposite direction or position
an unfortunate happening that hinders or impedes; something that is thwarting or frustrating

reversal (adjective)	reverse (adjective)
	of the transmission gear causing backward movement in a motor vehicle
	directed or moving toward the rear
	reversed (turned backward) in order or nature or effect

reversal (verb)	reverse (verb)
	change to the contrary
	turn inside out or upside down
	reverse the position, order, relation, or condition of
	rule against
	cancel officially