The word desalinising 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: 18
Highest Scoring Words With Friends™ Play In The Letters desalinising
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Seven Letter Word Alert: (58 words)
aidless, aisling, aligned, anilide, aniline, annelid, asinine, dailies, daisies, dangles, dealign, dealing, denials, designs, dialing, dingies, dissing, eliding, endings, ensigns, genials, glassed, indians, inlands, inlines, insides, islands, ladings, landing, leading, leaning, leasing, lending, lensing, liaised, liaises, ligands, ligases, lignins, lindens, linings, nailing, sailing, salines, sanding, sealing, sending, sensing, sidings, sidling, siennas, signals, silanes, singled, singles, slanged, sliding, snailed