Yes, return is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Return" Definition
noun
A formal tax statement on the required official form indicating taxable income, allowed deductions, exemptions, and the computed tax that is due. Also called income tax return, tax return.
A pipe or conduit for carrying something, especially water, back to its starting point.
A profit or yield, as from labor or investments. Often used in the plural.
A recurrence, as of a periodic occasion or event: the return of spring.
verb-transitive
Architecture To turn away from or place at an angle to the previous line of direction.
Football To run with (the ball) after a kickoff, punt, interception, or fumble.
Law To render or deliver (a writ or verdict, for example) to the proper officer or court of law.
Law To submit (an official report, for example) to a judge or other person in authority.
To elect or reelect, as to a legislative body.
adjective
Given, sent, or done in reciprocation or exchange: a return volley; a return invitation.
Having or formed by a reversal or change in direction; returning on itself, as a bend in a road or stream.
Of, relating to, or bringing about a going or coming back to a place or situation: the return voyage; a return envelope.
Performed, presented, or taking place again: a return engagement of the ballet; a return tennis match.
Relating to or being a roundtrip ticket.
idiom
In return In repayment or reciprocation.
verb-intransitive
To go or come back, as to an earlier condition or place.
To revert in speech, thought, or practice.
To revert to a former owner.