alternate vs turn

alternate and turn both are nouns.

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

As verbs, turn is a hypernym of alternate; that is, turn is a word with a broader meaning than alternate:

Other hypernyms of alternate include change by reversal, reverse.

alternate (noun)	turn (noun)
someone who takes the place of another person	the act of changing or reversing the direction of the course
	the act of turning away or in the opposite direction
	taking a short walk out and back
	a favor for someone
	(game) the activity of doing something in an agreed succession
	turning or twisting around (in place)
	a short performance that is part of a longer program
	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)

alternate (adjective)	turn (adjective)
of leaves and branches etc; first on one side and then on the other in two ranks along an axis; not paired
serving or used in place of another
occurring by turns; first one and then the other
every second one of a series

alternate (verb)	turn (verb)
do something in turns	twist suddenly so as to sprain
go back and forth; swing back and forth between two states or conditions	change to the contrary
reverse (a direction, attitude, or course of action)	go sour or spoil
be an understudy or alternate for a role	pass into a condition gradually, take on a specific property or attribute; become
exchange people temporarily to fulfill certain jobs and functions	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