The word unsupportive 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: 25
Highest Scoring Words With Friends™ Play In The Letters unsupportive
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Seven Letter Word Alert: (70 words)
envious, inverts, nervous, nippers, nitrous, norites, nutsier, orients, outpipe, outruns, outspin, outspun, oversit, overtip, piteous, pivoter, pointer, postern, posture, potpies, pouters, poutier, poutine, pronest, propine, protein, pterins, puniest, punster, punters, purines, purpose, pursuit, reinput, repivot, repoint, revuist, ripstop, ropiest, routine, ruinous, snipper, snippet, soppier, soupier, spinout, spouter, stonier, stopper, stourie, striven, support, tenuous, tippers, tonsure, toppers, topspin, topspun, triones, troupes, tuneups, turnips, uniters, unrivet, unstrip, uprisen, uprouse, upturns, version, virtues