The word dissevering 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: 19
Highest Scoring Words With Friends™ Plays In The Letters dissevering
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Seven Letter Word Alert: (54 words)
deniers, derives, designs, desires, deveins, deviser, devises, digress, dingier, dingies, dissing, diverge, diverse, diviner, divines, divings, drivein, driving, endives, enviers, genders, genesis, greisen, grieved, grieves, ingress, insider, insides, inverse, redness, reeving, regives, reigned, resends, resides, resigns, revised, revises, ridings, risings, sedgier, seeding, senders, serving, sidings, sieving, signees, signers, singers, veering, veinier, versine, versing, virgins