The word teleconferences 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: 27
Highest Scoring Words With Friends™ Play In The Letters teleconferences
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Seven Letter Word Alert: (50 words)
cenotes, centers, centres, cloners, coerces, colters, concern, concert, confect, confers, connect, consent, cornets, creoles, electee, elector, enclose, encores, enforce, entrees, estrone, feelers, fencers, fennels, fleecer, fleeces, fleeter, flenser, florets, foresee, forseen, lectern, necrose, nonfree, nonself, octenes, oftener, oneself, reclone, reclose, reelect, refects, refence, reflect, relents, rennets, roselet, scenter, secrete, tenners