The word ethanediols 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: 16
Highest Scoring Words With Friends™ Play In The Letters ethanediols
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Seven Letter Word Alert: (75 words)
adonise, aediles, aniseed, anodise, atheise, daltons, delates, delints, denials, denoise, denotes, dentals, dentils, destain, destine, details, detains, dilates, doltish, donates, elastin, elation, elodeas, eloined, enolase, enolate, entails, ethanes, ethanol, halides, halites, handles, handset, headons, headset, heisted, histone, hoisted, holiest, hostile, hotline, indoles, inhaled, inhales, instead, isolate, lateens, leadeth, leanest, leantos, leashed, lenited, lenites, lineate, linseed, lionets, loathed, loathes, nailset, nestled, oilseed, oleates, sainted, salient, sealion, shoaled, slanted, snailed, stained, standee, talonid, tensile, thiones, toadish, toenail