Yes, blast is playable
...and is worth 9 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Blast" Definition
noun
A destructive or damaging influence.
A forcible stream of air, gas, or steam from an opening, especially one in a blast furnace to aid combustion.
A powerful hit, blow, or shot.
A sudden loud sound, especially one produced by a stream of forced air: a piercing blast from the steam whistle.
A very strong gust of wind or air.
phrasal-verb
Blast off To take off, as a rocket.
verb-intransitive
Electronics To distort sound recording or transmission by overloading a microphone or loudspeaker.
To criticize or attack with vigor.
To emit a loud, intense sound; blare: speakers blasting at full volume.
To use or detonate explosives.
idiom
Full blast At full speed, volume, or capacity: turned the radio up full blast.
verb-transitive
To cause to shrivel, wither, or mature imperfectly by or as if by blast or blight: crops that were blasted by frost.
To criticize or attack vigorously.
To have a harmful or destructive effect on.
To hit with great force: The batter blasted the ball to right field.
To kill or destroy by hitting or shooting.
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