The word megakaryocytic is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 33
Highest Scoring Words With Friends™ Play In The Letters megakaryocytic
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Seven Letter Word Alert: (26 words)
acatery, cacemia, cartage, ceramic, cockier, cometic, corkage, cracket, cricket, emacity, erotica, gametic, grimace, icetray, imagery, margate, migrate, mockery, mycotic, myocyte, oatcake, octamer, racemic, ragtime, rickety, tackier