The word polyurethane 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 polyurethane
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Seven Letter Word Alert: (72 words)
alphorn, another, aplenty, atrophy, aureole, earthen, earthly, enolate, enteral, enthral, entropy, eophyte, epaulet, epurate, eternal, ethanol, euphony, eupnoea, haunter, hearten, heeltap, heptane, heptyne, lathery, leather, loather, neotype, nepotal, neutral, operant, operate, opulent, outearn, outleap, outplan, outplay, outpray, outyelp, panther, penalty, phenate, planter, plenary, pleurae, plouter, potheen, poulter, poultry, preheat, prelate, prelaty, prenote, pronate, pronely, protean, pteryla, rathole, repanel, replane, replant, replate, repleat, taphole, therapy, thereon, toluene, tourney, unalert, unalter, unearth, unlayer, youthen