The word thunderclap 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: 23
Highest Scoring Words With Friends™ Play In The Letters thunderclap
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Seven Letter Word Alert: (71 words)
archlet, candler, cantred, capture, centaur, central, chanted, chanter, chaplet, chapter, charted, chunder, churned, cleanup, curated, enthral, handler, haunted, haunter, hurtled, latched, launder, lunated, lunched, luncher, lurched, natured, neutral, nuclear, panther, parched, patched, planted, planter, plunder, pranced, prudent, punched, puncher, ranched, repatch, replant, thunder, traduce, tranced, tranche, truncal, trundle, unalert, unalter, uncaped, uncared, unclear, uncrate, undealt, undrape, unearth, unhated, unheard, unlaced, unlatch, unparch, unperch, unrated, untaped, unteach, untread, updater, uprated, upreach, uptrend