The word miscalculating 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: 29
Highest Scoring Words With Friends™ Play In The Letters miscalculating
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Seven Letter Word Alert: (96 words)
acclaim, accusal, acicula, aclinal, aclinic, actinic, actuals, against, aisling, alginic, alicant, alliums, alumina, alumnal, amusing, anglist, animals, animist, calamus, calcium, calculi, calling, calming, canulas, casting, catcall, causing, caustic, cingula, clastic, clausal, clinics, clitics, culling, cultism, gallant, gallium, glacial, glucans, iguanas, install, instill, intagli, italics, lacings, lacinia, laminal, laminas, lanugal, lasting, lilting, lingual, listing, lugsail, lunatic, lusting, magical, mailing, maligns, malting, maniacs, manilla, manuals, matings, mauling, milling, miscall, misting, mulling, musical, mustang, nautica, sailing, salting, sanctum, satanic, saucing, scaling, sciatic, siccing, silting, slating, slicing, sliming, smiling, smiting, stamina, stimuli, suiting, sultana, tailgun, tailing, tilings, tilling, timings, tsunami