The word epistemologies 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: 23
Highest Scoring Words With Friends™ Play In The Letters epistemologies
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Seven Letter Word Alert: (84 words)
egoisms, egoists, egoless, egotism, elegies, elegise, elegist, elegits, elitism, elogies, elogist, empties, epilogs, episome, epistle, epitome, esteems, gemless, gipsies, glimpse, glioses, gliosis, gooiest, goosies, gospels, implies, imposes, iolites, isotope, itemise, limpest, limpets, loosest, meioses, meiosis, missile, misstep, mitoses, mitosis, molests, mopiest, oiliest, oligist, omelets, oolites, osselet, pegless, pelites, pestles, petiole, petless, pieless, pieties, pietism, piglets, pigmies, pistils, pistols, pitless, poesies, poetess, poetise, pomelos, postils, semilog, similes, simples, soloist, somites, spiegel, spigots, steelie, steeple, stimies, stogies, stomies, stooges, stoolie, temples, tieless, tipless, toeless, topless, topsoil