The word unselfconscious 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: 29
Highest Scoring Words With Friends™ Play In The Letters unselfconscious
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Seven Letter Word Alert: (65 words)
celcius, celsius, cession, ciscoes, colonic, colossi, concise, concuss, confess, confine, confuse, console, consuls, cosines, council, counsel, cousins, elusion, ensouls, felsics, finless, flosses, flounce, focuses, fossils, fucoses, funnels, funnies, fusions, icecool, infuses, insoles, ionones, lesions, lessons, lioness, loonies, loosens, nonlife, nonself, nucleic, nucleon, nucleus, occluse, olefins, oleosin, oncosis, osseins, osseous, ossicle, sconces, session, sinless, sinuous, sinuses, sluices, sonless, success, sulfone, sunless, sunnies, unclose, uncoils, unfocus, unloose