The word expostulates 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: 24
Highest Scoring Words With Friends™ Plays In The Letters expostulates
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Seven Letter Word Alert: (59 words)
apostle, auletes, auxeses, elapses, eluates, epaulet, espouse, estates, estuate, exposal, exposes, expulse, lotuses, luxates, oleates, osselet, outlast, outleap, outlets, outsees, outsets, outstep, palette, passout, pastels, peltate, pestles, petless, pleases, poetess, poleaxe, pottles, pulsate, salutes, sealpox, septate, septets, settles, sexpots, sextets, sexuals, solutes, spousal, stalest, staples, statues, taluses, taxless, tealess, teapots, teasels, teleost, textual, toeless, toluate, topless, toupees, tousles, upstate