The word polymerising 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: 24
Highest Scoring Words With Friends™ Play In The Letters polymerising
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Seven Letter Word Alert: (94 words)
elision, eloigns, eloping, employs, epilogs, eponyms, epsilon, ergonym, geonyms, gimpier, girlies, girnels, glimpse, glories, gremlin, grimily, ignores, imperil, impinge, implies, implore, imposer, inspire, ioniser, ironies, ironyms, legions, leprosy, limping, lingers, lingoes, lionise, lionism, liriope, lisping, lysogen, mingler, mingles, miserly, misrely, mongers, mongery, mongrel, myelins, myogens, noisier, noisily, origins, perming, pigeons, pigmies, pilgrim, pilings, pingers, pingler, pingles, pingoes, pleions, poising, polymer, prelims, preying, priming, progeny, proline, promise, pronely, pryings, pygmies, pyrones, regions, relying, roiling, romping, semilog, simpler, sirloin, slimier, sliming, slinger, sloping, smilier, smiling, soiling, spinier, spiring, spoiler, sponger, sporing, springy, syringe, yelming, yelping, yoginis