The word overreacts 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: 17
Highest Scoring Words With Friends™ Plays In The Letters overreacts
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Seven Letter Word Alert: (55 words)
acerose, averser, averter, careers, carrots, carters, carvers, caterer, cavorts, cerates, coarser, coaster, coverer, coverts, coveter, craters, cravers, creaser, creates, creator, erector, evocate, octaves, overact, overate, overeat, oversat, oversea, overset, reactor, rearose, reavers, recoats, recover, recrate, rectors, reroast, rescore, restore, retears, retrace, reverts, revotes, roaster, roseate, savorer, serovar, serrate, starver, tearers, terrace, tracers, trocars, vectors, vetoers