The word overreaction 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: 20
Highest Scoring Words With Friends™ Play In The Letters overreaction
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Seven Letter Word Alert: (56 words)
acetone, aconite, activer, arenite, averter, carrion, cartoon, carvone, caterer, certain, convert, cornier, coroner, coronet, coterie, coverer, coveter, creator, crooner, enactor, enteric, enticer, erector, erotica, erratic, etaerio, evictor, evocate, inerter, nervier, oration, ornater, otarine, ovation, overact, overate, overeat, overran, reactor, reciter, recover, recrate, reenact, reinter, retrace, retrain, revoice, riveter, tearier, terrace, terrain, terrane, trainee, trainer, triaene, veteran