The word pleonastes 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: 15
Highest Scoring Words With Friends™ Play In The Letters pleonastes
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Seven Letter Word Alert: (40 words)
alpeens, apostle, aptness, elapses, enolase, enolate, enseals, lateens, leanest, leantos, leptons, napless, nepotal, nestles, netless, oleates, onestep, openest, osselet, pastels, pentose, pestles, petless, planets, pleases, poetess, poteens, sateens, senates, sensate, spelean, spleens, stanols, staples, stenose, stepson, tealess, teasels, toeless, topless