The word overachievers 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: 26
Highest Scoring Words With Friends™ Play In The Letters overachievers
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Seven Letter Word Alert: (74 words)
acerose, achieve, archers, archive, arrives, averser, avivore, careers, carries, carvers, cashier, charier, cheerer, cheerio, coarser, coheirs, coherer, coheres, corsair, coverer, crasher, cravers, creaser, crosier, echoers, erosive, evasive, hearers, heavers, heavier, heroics, heroise, hoarier, hoarser, horsier, hoverer, ovaries, oversea, oversee, reacher, reaches, rearise, rearose, reavers, receive, rechose, recover, rehears, rehires, rescore, reserve, reshare, reshave, reshore, reveres, reverie, reverse, reviser, reviver, revives, revoice, roaches, savorer, savvier, scarier, scoriae, serovar, service, severer, shearer, sheerer, varices, viscera, voicers