The word curvaceously 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: 27
Highest Scoring Words With Friends™ Play In The Letters curvaceously
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Seven Letter Word Alert: (39 words)
accloys, accrues, accurse, accuser, acerous, alcoves, calyces, carouse, closure, clovers, cloyers, coalers, cyclase, cyclers, elusory, escolar, layover, louvers, louvres, occluse, occular, oculars, oracles, oscular, overlay, raucous, recoals, recusal, savoury, secular, slavery, solacer, suavely, succour, vacuole, vacuous, valuers, velours, voyeurs