The word prevaricating 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: 26
Highest Scoring Words With Friends™ Play In The Letters prevaricating
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Seven Letter Word Alert: (83 words)
activer, agatine, anaptic, angrier, apteria, arraign, arrange, avarice, aviatic, avigate, cantrap, cantrip, captain, captive, carinae, carnage, carping, cartage, carting, carving, certain, citrine, crating, craving, cringer, earring, erratic, eviting, grainer, granite, granter, igniter, inciter, inertia, ingrate, inviter, narrate, pageant, painter, pairing, parting, partner, patinae, pertain, picante, picrate, picrite, piecing, prairie, prancer, prating, pricier, pricing, printer, private, rainier, rangier, ratrace, ravager, reaping, rearing, reaving, regrant, reicing, repaint, reprint, retrain, tanager, tangier, tarring, tearing, terrain, tiering, tracing, trainer, vagrant, vantage, variant, variate, vearing, vinegar, vintage, vitrine