The word progestogen 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: 19
Highest Scoring Words With Friends™ Play In The Letters progestogen
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Seven Letter Word Alert: (28 words)
engorge, estrone, gorgons, negroes, nestegg, onestep, openers, openest, operons, orogens, pentose, poorest, postern, poteens, prenote, present, pronest, protege, protons, regents, reopens, repents, serpent, snogger, snooper, sponger, sporont, stooper