The word desalinised 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 desalinised
:
Seven Letter Word Alert: (31 words)
aediles, aidless, anilide, aniseed, dailies, daisied, daisies, dandies, dandles, deadens, deleads, denials, desands, diesels, disdain, disease, eleidin, endless, enseals, insides, islands, laddies, liaised, liaises, linseed, saddens, saddles, salines, seaside, silanes, snailed