The word destabilised 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 destabilised
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Seven Letter Word Alert: (65 words)
abseils, aediles, aidless, albites, alibies, astilbe, baddest, baldest, bedless, bedside, bedsits, belated, besides, betided, betides, biassed, biddies, blasted, bleated, blessed, blissed, dailies, daisied, daisies, deadest, debased, debases, debated, debates, debited, deities, delated, delates, deleads, delists, desalts, desilts, details, diesels, dieties, dilated, dilates, disable, disease, distils, easiest, edibles, laddies, liaised, liaises, libated, libates, saddest, saddles, seabeds, seaside, sedated, sedates, sidelit, stabled, stables, tealess, teasels, teddies, tieless