The word overstretches 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: 22
Highest Scoring Words With Friends™ Play In The Letters overstretches
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Seven Letter Word Alert: (76 words)
cheerer, cheeses, coherer, coheres, corsets, cotters, coverer, coverts, coveter, cresset, crosser, echoers, erecter, erector, escorts, etchers, heteros, hoverer, oversee, overset, rechose, recover, recross, rectors, reerect, rescore, resects, reserve, reshoes, reshore, resorts, resters, restore, retches, retests, retorts, retrees, reveres, reverse, reverts, revotes, rhetors, rosette, rosters, rotters, scorers, secrete, secrets, sectors, seether, seethes, servers, settees, setters, severer, sheerer, sheeter, shorter, shovers, sorters, steerer, stereos, streets, stretch, teeters, teether, teethes, tersest, testers, tethers, thereto, torches, trochee, vectors, vetches, vetoers