The word incurvatures 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 incurvatures
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Seven Letter Word Alert: (91 words)
activer, actives, antsier, arcsine, arrives, arsenic, artsier, aunties, auteurs, canters, carnies, carries, carters, carvers, cauters, caverns, centaur, certain, cistern, craters, cravers, cretins, cristae, cruiser, curates, currant, current, curries, cursive, curtain, curvier, encrust, errants, erratic, incrust, incurve, insurer, invects, inverts, naivest, nastier, natives, natures, nectars, nurture, nutcase, nutsier, raciest, ranters, ravines, recants, recruit, reincur, restain, retains, retinas, retrain, returns, revuist, runtier, rustier, saucier, saunter, scanter, scarier, servant, sinuate, stainer, starver, striven, striver, tarries, taverns, terrain, tracers, trainer, trances, turners, uncarts, uncrate, uncurse, uniters, unrivet, untruer, uricase, urinate, vainest, varices, veritas, virtues, viscera