The word indigestibility 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: 25
Highest Scoring Words With Friends™ Play In The Letters indigestibility
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Seven Letter Word Alert: (59 words)
belting, besting, betting, bitings, bitting, bylined, bylines, delints, density, dentils, dentist, destiny, dieting, dietist, dignity, dingies, dingily, distyle, ditties, dyeings, editing, eliding, elitist, giblets, glinted, glisten, ignited, ignites, ileitis, indites, instyle, letting, lignite, listing, setting, sibling, sidelit, sidling, silting, singled, singlet, sitting, sliding, slitted, snidely, stilted, stinted, styling, testily, testing, tidbits, tidiest, tidings, tidying, tilings, tilting, tingled, tingles, tiniest