The word progesterone 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: 18
Highest Scoring Words With Friends™ Play In The Letters progesterone
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Seven Letter Word Alert: (58 words)
enterer, entrees, estrone, greener, greeter, gropers, negroes, onestep, openers, openest, operons, orogens, pentose, poorest, porters, postern, poteens, preener, prenote, present, presort, preteen, pronest, protege, protons, reenter, regents, regreen, regreet, regrets, reneger, reneges, renters, reopens, repents, reports, reposer, rerents, reroots, restore, retrees, rooster, rooters, serener, serpent, sneerer, snooper, snorter, sponger, sporont, steepen, steeper, steerer, sterner, stooper, terpene, torpors, trooper