The word fascinatingly 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 fascinatingly
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Seven Letter Word Alert: (75 words)
against, agility, aisling, alginic, alicant, analyst, anginal, anginas, anglify, anglist, caftans, cannily, canting, casting, cyanins, facials, facings, failing, faining, faintly, falsity, fanatic, fancily, fantail, fantasy, fascial, fasting, filings, finials, finings, flaying, gainsay, glycans, incants, infancy, infants, inflict, intagli, italics, lacings, lacinia, lancing, lasting, lifting, lignify, lignins, linings, listing, nailing, nastily, niacins, niftily, sailing, saintly, salting, satanic, scaling, scantly, sifting, signify, silting, slating, slaying, slicing, stagily, stannic, staying, stygian, styling, syncing, tailfan, tailfin, tailing, tilings, tinnily