The word voraciousness 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: 22
Highest Scoring Words With Friends™ Play In The Letters voraciousness
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Seven Letter Word Alert: (82 words)
acerous, ancress, arcsine, arouses, arsenic, assures, caisson, canoers, carnies, carouse, carvone, caseins, casinos, cassons, cassoon, causers, caverns, censors, cession, coarsen, coiners, corneas, coronas, cosines, courses, cousins, covines, cronies, crosses, cruises, cursive, cussers, envious, erosion, evasion, incurve, insures, issuers, nervous, noosers, novices, oncosis, onerous, osseins, osseous, ovaries, racoons, ravines, reasons, recoins, rescans, sassier, saucers, saucier, saviors, saviour, savours, scarves, scissor, scoriae, scorias, seasons, seniors, sensors, serious, session, sinuses, sooners, sources, sucrase, sucrose, sunrise, uncover, uncross, uricase, varices, various, version, viruses, viscera, viscous, voicers