The word telephoners 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: 18
Highest Scoring Words With Friends™ Plays In The Letters telephoners
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Seven Letter Word Alert: (52 words)
elopers, entrees, estrone, ethenes, helpers, heptene, heptose, heteros, holster, hornets, hostler, leptons, onestep, openers, openest, peelers, pelters, pentose, petrels, petrols, phenols, postern, poteens, potheen, pothers, prenote, present, preteen, pronest, reheels, rehones, relents, reopens, repeels, repents, replete, replots, respelt, roselet, seether, serpent, sheeter, shelter, shorten, sleeper, steepen, steeper, steeple, strophe, terpene, thereon, thrones