reversal vs turn

reversal and turn both are nouns.

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

As nouns, turn is a hypernym of reversal; that is, turn is a word with a broader meaning than reversal:

Other hypernyms of reversal include turning.

reversal (noun)	turn (noun)
a change from one state to the opposite state	the act of changing or reversing the direction of the course
the act of reversing the order or place of	the act of turning away or in the opposite direction
turning in the opposite direction	taking a short walk out and back
a major change in attitude or principle or point of view	a favor for someone
a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside	(game) the activity of doing something in an agreed succession
a decision to reverse an earlier decision	turning or twisting around (in place)
turning in an opposite direction or position	a short performance that is part of a longer program
an unfortunate happening that hinders or impedes; something that is thwarting or frustrating	a movement in a new direction
	an unforeseen development
	a circular segment of a curve
	(sports) a division of a game during which one team is on the offensive
	a time period for working (after which you will be relieved by someone else)

reversal (verb)	turn (verb)
	twist suddenly so as to sprain
	change to the contrary
	go sour or spoil
	pass into a condition gradually, take on a specific property or attribute; become
	undergo a transformation or a change of position or action
	change color
	become officially one year older
	have recourse to or make an appeal or request for help or information to
	direct at someone
	shape by rotating on a lathe or cutting device or a wheel
	let (something) fall or spill from a container
	alter the functioning or setting of
	cause (an object) to assume a crooked or angular form
	to break and turn over earth especially with a plow
	to change orientation or direction
	cause to move around a center so as to show another side of
	cause to move around or rotate
	pass to the other side of
	move around an axis or a center
	to send or let go
	cause to move along an axis or into a new direction
	channel one's attention, interest, thought, or attention toward or away from something
	get by buying and selling
	accomplish by rotating
	undergo a change or development
	cause to change or turn into something different;assume new characteristics