Yes, rest is playable
...and is worth 4 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Rest" Definition
noun
A device used as a support: a back rest.
A short pause in a line of poetry; a caesura.
A support for a lance on the side of the breastplate of medieval armor.
Cessation of work, exertion, or activity.
idiom
At rest Free from anxiety or distress.
At rest Motionless; inactive.
Lay To bury (a dead body); inter.
verb-transitive
Law To cease voluntarily the introduction of evidence in (a case).
To base or ground: I rested my conclusion on that fact.
To fix or direct (the gaze, for example).
To give rest or repose to: rested my eyes.
verb-intransitive
Law To cease voluntarily the presentation of evidence in a case: The defense rests.
To be at peace or ease; be tranquil.
To be fixed or directed on something: "His brown eyes rested on her for a moment” ( John le Carré).
To be imposed or vested, as a responsibility or burden: The final decision rests with the chairperson.
To be located or be in a specified place: The original manuscript rests in the museum.
verb
To get rest by lying down.
To cease from action or motion refrain from labor or exertion.
To be free from anxiety or disturbance.
To sit or lie fixed or supported .
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