The word approximates 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: 28
Highest Scoring Words With Friends™ Play In The Letters approximates
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Seven Letter Word Alert: (63 words)
amritas, appears, apposer, apprise, aptamer, apteria, armpits, atomise, atresia, atropia, exports, exposit, extirps, imparts, impasto, imports, imposer, maestro, mappers, moister, mopiest, moppers, mortise, opiates, pampers, parapet, parties, pastier, pastime, permits, pirates, pixmaps, potpies, poxiest, preamps, premixt, primase, primate, primost, promise, prompts, proxies, restamp, ripstop, ropiest, sappier, seaport, smartie, soapier, sopaipa, soppier, spiraea, stamper, stomper, stopper, tampers, tappers, tippers, toppers, toprims, toxemia, traipse, xeromas