The word distinctiveness 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 distinctiveness
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Seven Letter Word Alert: (70 words)
deceits, deistic, deities, densest, dentine, dentins, dentist, descent, desists, destine, detects, detents, detests, deveins, devests, devices, devises, diciest, dietics, dieties, dietine, dietist, dissect, dissent, ditties, divests, divines, eidetic, endives, enticed, entices, evicted, evident, evinced, evinces, iciness, incense, incests, incised, incises, incited, incites, indents, indices, indicts, indites, insects, insides, insists, intends, intense, intents, invects, invents, invests, invited, invitee, invites, scented, seitens, sestets, sestine, snidest, stented, stinted, tensest, tidiest, tiniest, tsetses, visited