The word putrescent 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: 18
Highest Scoring Words With Friends™ Play In The Letters putrescent
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Seven Letter Word Alert: (36 words)
censure, centers, centres, cuprene, curette, cutters, encrust, entrust, netters, neuters, nutters, pectens, percent, precent, precuts, present, pretest, punster, punters, putters, repents, respect, retunes, scenter, scepter, sceptre, serpent, specter, spectre, sputter, stunter, tenters, tenures, trustee, unerect, unreset