The word overconfident 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: 26
Highest Scoring Words With Friends™ Play In The Letters overconfident
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Seven Letter Word Alert: (61 words)
centred, cervoid, codeine, codrive, codrove, condone, confide, confine, conifer, connive, connote, contend, convene, convent, convert, coronet, coterie, covered, coveted, coveter, crooned, definer, deforce, dentine, divorce, dovecot, encoder, encored, endnote, enforce, enteric, enticed, enticer, environ, evicted, evictor, evident, evinced, fervent, fronted, inferno, intoned, intoner, nitrene, nondiet, nonfeed, nonfire, nonfree, nonriot, nonvoid, noticed, oftener, overdot, overfed, recited, refined, revoice, revoted, riveted, verdict, vintner