The word epidemiologist 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: 24
Highest Scoring Words With Friends™ Play In The Letters epidemiologist
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Seven Letter Word Alert: (93 words)
deities, delimes, delimit, demotes, deposit, deslime, despite, despoil, dieties, dimples, dipoles, doilies, dopiest, edgiest, egotism, elegist, elegits, elitism, elogies, elogist, emptied, empties, epidote, epilogs, episode, episome, epistle, epitome, geodome, glimpse, goodies, gooiest, idolise, idolist, ileitis, impedes, implied, implies, implode, imposed, iodites, iolites, isotope, itemise, limited, limpest, limpets, midgets, mildest, misedit, mispled, mistold, mopiest, oiliest, oilseed, oldtime, oligist, omelets, oolites, opioids, osteoid, pelites, pestled, petiole, pieties, pietism, piglets, pigmies, piloted, pledges, poetise, pomelos, poodles, posited, semilog, sidelit, sigmoid, smelted, soliped, spiegel, splodge, spoiled, spooled, stimied, stomped, stooged, stooled, stoolie, stooped, telopod, temples, topside, topsoil