The word curtseying 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: 19
Highest Scoring Words With Friends™ Play In The Letters curtseying
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Seven Letter Word Alert: (28 words)
century, cistern, citrusy, cretins, cringes, cryings, cursing, curtsey, cygnets, cystine, encrust, gunters, gurneys, gustier, gutsier, incrust, nutsier, resting, retying, reusing, rusting, scrying, stinger, stringy, syringe, triynes, uniters, urgency