The word polymerised 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: 21
Highest Scoring Words With Friends™ Play In The Letters polymerised
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Seven Letter Word Alert: (71 words)
delimes, demerol, demirep, deplore, deploys, deposer, deslime, despoil, dimples, dipoles, elopers, empires, employs, eomyids, epiderm, epimers, episode, episome, eyedrop, eyelids, impedes, implode, implore, imposed, imposer, isomere, leprosy, medleys, milords, misdoer, miserly, mispled, misrely, modeler, molders, moldier, moseyed, myeloid, oilseed, periled, periods, polymer, prelims, premise, premold, preside, presold, promise, redpole, remodel, remolds, reoiled, repiled, repiles, replied, replies, reposed, resoled, seedily, simpler, smolder, soldier, soliped, spidery, spoiled, spoiler, yelmers, yelpers, yielder, yodeler, yodlers