The word demyelination 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™ Play In The Letters demyelination
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Seven Letter Word Alert: (85 words)
adenine, ailment, aliment, alimony, amenity, amidone, amylene, amyloid, anemone, anilide, aniline, annelid, annoyed, anodyne, antlion, antonym, anytime, daytime, delimit, dentine, diamine, dienyne, dietine, diynone, doyenne, dyeline, edition, elation, eleidin, eloined, emailed, emendal, eminent, enamine, endnote, endonym, enolate, inanely, intoned, lamnoid, laytime, lemoned, lenient, lenited, limeade, limited, lineate, lineman, linemen, mantled, matinee, meatily, mediate, melanin, mention, metaled, midline, miniate, moneyed, monilia, montane, myeline, myeloid, needily, neonate, netmail, nominal, nominee, nondate, nondiet, nonlate, nonlead, nonmail, nonmale, nonmate, nonmeal, nonmeat, notedly, oldtime, onetime, talonid, timidly, tinnily, toenail, yealmed