The word decommissioned 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 decommissioned
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Seven Letter Word Alert: (76 words)
cession, codeine, comedos, commend, commode, commons, condoms, cosines, cosmism, decides, decodes, deicide, demised, demises, demonic, denoise, descend, desmids, desmoid, desnood, dimness, diocese, diosmin, discoid, disodic, dominos, encoded, encodes, endemic, eosinic, iciness, iconism, immense, incised, incises, incomes, indices, insides, iodides, iodines, iodised, iodises, iodisms, ionised, ionises, meioses, meiosis, menisci, middens, mimeoed, mimesis, miocene, miscode, miscoin, misdeed, misdeem, misdoes, misdone, mission, modemed, monoids, nemesis, noisome, nosodes, oddness, oncosis, seconds, seismic, siemens, sinoids, snooded, soddens, soddies, sodomic, someone, somonis