The word preponderated 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: 22
Highest Scoring Words With Friends™ Plays In The Letters preponderated
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Seven Letter Word Alert: (68 words)
adepter, adopted, adopter, adorned, adorner, deepend, denoted, deponed, detrend, donated, dreader, dropped, dropper, eardrop, entered, enterer, notepad, operand, operant, operate, ordered, ornater, papered, paperer, partner, pentode, peptone, petered, portend, praetor, predate, preened, preener, prenote, prepare, prepend, pretape, preteen, pretend, prodder, pronate, propane, propene, prorate, protean, rapport, readopt, readorn, redated, redrape, redtape, reenter, repaper, reraped, retaped, retrade, retread, retreed, tapered, taperer, terpene, terrane, trapped, trapper, treaded, treader, trended, trodden