The word unsupervised 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: 23
Highest Scoring Words With Friends™ Play In The Letters unsupervised
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Seven Letter Word Alert: (60 words)
deniers, depress, deprive, derives, desires, despise, deveins, deviser, devises, diverse, dressup, endives, endures, ensured, ensures, enviers, insured, insures, inverse, penises, pensive, perused, peruses, preside, pressed, prevues, purines, pursued, pursues, pussier, redness, reissue, repined, repines, resends, resides, residue, respins, revised, revises, ripened, senders, snipers, spender, spiders, spurned, sudsier, sunrise, supered, suspend, suspire, undress, unipeds, uprisen, uprises, upsides, usurped, versine, vespers, viruses