Yes, beat is playable
...and is worth 7 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Beat" Definition
noun
A member of the Beat Generation.
A pattern of stress that produces the rhythm of verse.
A stroke or blow, especially one that produces a sound or serves as a signal.
A variable unit of time measuring a pause taken by an actor, as for dramatic effect.
idiom
Around To fail to confront a subject directly.
Beat a retreat To make a hasty withdrawal.
Beat it Slang To leave hurriedly.
Beat the bushes To make an exhaustive search.
Beat up on To attack physically.
phrasal-verb
Beat off Vulgar Slang To masturbate.
Beat out Baseball To reach base safely on (a bunt or ground ball) when a putout is attempted.
verb-transitive
Informal To arrive or finish before (another): We beat you home by five minutes.
Informal To avoid or counter the effects of, often by thinking ahead; circumvent: beat the traffic.
Informal To be superior to or better than: Riding beats walking.
Informal To deprive, as by craft or ability: He beat me out of 20 dollars with his latest scheme.
Music To mark or count (time or rhythm), especially with the hands or with a baton.
adjective
Informal Worn-out; fatigued.
Of or relating to the Beat Generation.
Being in a state of exhaustion .
Sapped of resolution or morale.
Of, relating to, or being .
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