The word polycythemia 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: 28
Highest Scoring Words With Friends™ Plays In The Letters polycythemia
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Seven Letter Word Alert: (50 words)
acolyte, alchemy, alethic, aloetic, apocyte, campily, capitol, chaplet, cheaply, cholate, chyloma, climate, coalite, coalpit, compile, cotylae, ecthyma, ectopia, emacity, empathy, emptily, epochal, ethical, haplite, hepatic, hoplite, hyalite, impeach, laytime, maypole, meatily, metical, mycelia, mycetal, myeloic, myocyte, opacity, optical, optimal, plicate, polecat, polemic, potamic, potiche, pyaemic, pyocyte, taphole, topical, typical, yachtie