The word loquaciousness 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: 30
Highest Scoring Words With Friends™ Play In The Letters loquaciousness
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Seven Letter Word Alert: (68 words)
aqueous, caisson, calques, caseins, casinos, cassons, cassoon, cauline, celosia, celsius, cession, classes, clauses, cliques, coalise, coequal, colossi, console, consuls, cosines, counsel, cousins, elusion, ensouls, insoles, inulase, lassies, lassoes, lesions, lessons, lioness, loonies, loosens, nucleus, oilcans, oleosin, oncosis, osseins, osseous, ossicle, quinces, quinoas, quinols, sacless, salines, saloons, sealion, seasons, sensual, sequins, sequoia, session, silanes, sinless, sinuous, sinuses, sluices, socials, solaces, sonless, squeals, sunless, unclose, uncoils, unequal, unlaces, unloose, unseals