The word disharmonious 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: 21
Highest Scoring Words With Friends™ Play In The Letters disharmonious
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Seven Letter Word Alert: (50 words)
adhorns, amorous, arshins, dimuons, diosmin, dirhams, disarms, dishorn, domains, dominos, donairs, doorman, durians, hadrons, hairdos, hassium, hominid, honours, humidor, indiums, indoors, inroads, iodisms, manhood, maroons, midairs, midrash, missaid, mission, monoids, moorish, muroids, nimrods, nourish, ominous, ordains, radiums, raisins, randoms, ransoms, rhodium, shrouds, simians, sinoids, sodiums, somonis, sourish, sunroom, unsmash, urnmoss