The word desalinates 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: 14
Highest Scoring Words With Friends™ Play In The Letters desalinates
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Seven Letter Word Alert: (70 words)
aediles, aidless, aliased, aliases, aniseed, atlases, dalasis, dealate, delates, delints, delists, denials, densest, dentals, dentils, desalts, desilts, destain, destine, details, detains, diesels, dilates, disease, dissent, easiest, elastin, endless, enlists, enseals, entails, instead, islands, lateens, leanest, lenited, lenites, lineate, linseed, listens, nailset, nestled, nestles, netless, sainted, salient, salines, sandals, sateens, sealant, seaside, sedates, seitans, seitens, senates, sensate, sestina, sestine, silanes, silents, slanted, snailed, snidest, stained, standee, tealess, teasels, tensile, tieless, tinsels