The word telephonists 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: 19
Highest Scoring Words With Friends™ Plays In The Letters telephonists
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Seven Letter Word Alert: (97 words)
enlists, entitle, epistle, epithet, epsilon, heptose, hessite, hipness, histone, holiest, hoplite, hostels, hostile, hotline, hotness, insoles, insteps, iphones, isohels, lenites, leptons, lesions, lioness, lionets, listens, nestles, netless, nettles, nosiest, notists, onestep, openest, osselet, pelites, penises, penlite, pentose, peonies, pestles, petiole, petites, petless, pettish, phenols, phonies, pieless, pinhole, pinless, pistols, pistons, pitless, pleions, poesies, poetess, poetise, postils, poteens, potheen, potties, pottles, seitens, septets, sestine, settles, shitpot, silents, siphons, sphenes, spinels, spinets, spinose, spittle, spleens, splines, splints, spotlit, stenose, stepson, stetson, stonish, teleost, telnets, tensest, tensile, theists, thiones, thistle, tieless, tinpots, tinsels, tipless, tiptoes, toeless, toilets, tonsils, topless, topline