The word polybutenes 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 polybutenes
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Seven Letter Word Alert: (37 words)
bentley, boletes, bonelet, boneset, butenes, butynes, eluents, enstyle, eustely, eustyle, eyebolt, eyespot, leptons, neotype, noblest, obesely, onestep, openest, opulent, outyelp, pentose, penults, plutons, poteens, pueblos, steeply, subnote, subplot, subtone, subtype, sunbelt, tensely, toluene, toupees, unbelts, unblest, unbolts