The word norepinephrines 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: 26
Highest Scoring Words With Friends™ Play In The Letters norepinephrines
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Seven Letter Word Alert: (62 words)
heroine, heroins, heroise, hinnies, hippies, hoppers, hornier, horsier, inosine, inshore, inspire, ioniser, iphones, ironers, ironies, nephron, ninepin, nippers, nippier, noisier, nonenes, openers, peepers, penners, pennies, pension, peonies, phonier, phonies, pinenes, pinions, pioneer, preener, propene, propine, prosper, rehires, rehones, rennins, reopens, repiner, repines, repipes, reposer, reprise, rerinse, reshine, reshore, respire, rippers, rosehip, seepier, serener, sheerer, shinier, shipper, shopper, sneerer, snipper, soppier, spinier, spinner