turn vs shift

turn and shift both are nouns.

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

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

turn: a time period for working (after which you will be relieved by someone else)
shift: the time period during which you are at work

Other hypernyms of turn include duty period, work shift.

turn (noun)	shift (noun)
the act of changing or reversing the direction of the course	the act of moving from one place to another
the act of turning away or in the opposite direction	the act of changing one thing or position for another
taking a short walk out and back	a loose-fitting dress hanging straight from the shoulders without a waist
a favor for someone	a woman's sleeveless undergarment
(game) the activity of doing something in an agreed succession	the key on the typewriter keyboard that shifts from lower-case letters to upper-case letters
turning or twisting around (in place)	an event in which something is displaced without rotation
a short performance that is part of a longer program	a qualitative change
a movement in a new direction	a crew of workers who work for a specific period of time
an unforeseen development	(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
a circular segment of a curve	the time period during which you are at work
(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)

turn (verb)	shift (verb)
twist suddenly so as to sprain	make a shift in or exchange of
change to the contrary	move and exchange for another
go sour or spoil	lay aside, abandon, or leave for another
pass into a condition gradually, take on a specific property or attribute; become	move from one setting or context to another
undergo a transformation or a change of position or action	change in quality
change color	change gears
become officially one year older	change phonetically as part of a systematic historical change
have recourse to or make an appeal or request for help or information to	use a shift key on a keyboard
direct at someone	change place or direction
shape by rotating on a lathe or cutting device or a wheel	move very slightly
let (something) fall or spill from a container	move around
alter the functioning or setting of	move abruptly
cause (an object) to assume a crooked or angular form	move sideways or in an unsteady way
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