The word unmelodiously 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 unmelodiously
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Seven Letter Word Alert: (40 words)
dimuons, dollies, dominos, doomily, elusion, emulous, emulsin, eomyids, euonyms, illumed, indoles, indolyl, isonomy, loonies, loosely, lousily, misdone, modules, modulus, monoids, moodily, moulins, mousily, myelins, myeloid, nodules, noisome, noodles, odonyms, oleosin, ominous, snidely, solidly, soundly, sullied, sunlily, syndome, unloose, unoiled, unsully