The word disorganise 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: 15
Highest Scoring Words With Friends™ Play In The Letters disorganise
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Seven Letter Word Alert: (88 words)
adonise, adoring, agonies, agonise, airings, airside, aneroid, angioid, anodise, arising, dairies, daisies, dangers, denarii, deraign, designs, diaries, digress, dingier, dingies, dissing, dogears, donairs, dosages, dossier, dragons, engross, erasing, eroding, gainers, ganders, gardens, gassier, grained, grassed, groaned, groined, grossed, ignored, ignores, indigos, indorse, ingress, inroads, insider, insides, iodines, iodiser, iodises, ionised, ioniser, ionises, ironage, ironies, negroid, noisier, oranges, ordains, origins, raiding, raising, raisins, reading, reasons, redoing, regains, regions, resands, resigns, ridings, risings, roadies, rosined, sanders, sandier, sardine, seadogs, searing, seniors, sidings, signers, signora, signors, singers, sinoids, soaring, sodgers, sringas