The word copolymerizing 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: 38
Highest Scoring Words With Friends™ Play In The Letters copolymerizing
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Seven Letter Word Alert: (86 words)
ceiling, clinger, cloying, coiling, cologne, compile, cooling, cooping, copying, coreign, cornily, cozying, crimple, cryogen, ecology, economy, eloping, empiric, enzymic, epizoon, ergonym, genomic, gimpier, glycine, goopier, gremlin, grimily, iconize, imperil, impinge, implore, incomer, ionizer, ionomer, legroom, limping, lionize, liriope, looming, loonier, loopier, looping, mingler, mongery, mongrel, monocle, monoecy, mooring, moronic, myeloic, oeconym, omicron, orogeny, perming, piecing, pilgrim, pingler, polemic, polygon, polymer, pooling, porcine, precool, preying, pricing, priming, prizing, progeny, proline, prolong, pronely, pyloric, reicing, relying, roiling, romping, rooming, yelming, yelping, zeroing, zincier, zingier, zipline, zoogeny, zooming, zymogen