The word overemphasize 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: 34
Highest Scoring Words With Friends™ Play In The Letters overemphasize
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Seven Letter Word Alert: (50 words)
amorphs, amperes, apozems, empires, epimers, episome, erosive, hampers, harpies, heapers, heavers, heavier, heroise, heroism, heroize, imposer, improve, isomere, meshier, misaver, mishear, ovaries, oversea, oversee, peevers, peevish, pheezes, preemie, premise, primase, promise, reheaps, rehomes, removes, repaves, reseize, reshape, reshave, revamps, rhizoma, rhizome, rosehip, seamier, seepier, seriema, sharpie, soapier, vampire, verismo, zeroise