The word diaphoretic 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: 20
Highest Scoring Words With Friends™ Play In The Letters diaphoretic
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Seven Letter Word Alert: (51 words)
adopter, apricot, carotid, cathode, chaired, chapter, chariot, charted, chirped, cordate, diopter, dioptre, diorite, ditcher, ectopia, edaphic, erotica, hardtop, haricot, hepatic, itchier, opiated, parched, parotid, patched, peridot, picrate, picrite, pirated, pitched, pitcher, pithead, pithier, poached, poacher, porched, pothead, potiche, precoat, predict, readopt, repatch, repitch, riptide, roached, tapirid, tiderip, toparch, torched, triadic, trophic