The word progestin 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: 15
Highest Scoring Words With Friends™ Play In The Letters progestin
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Seven Letter Word Alert: (28 words)
egotrip, goiters, goitres, goriest, ignores, norites, orients, pigeons, pingers, pingoes, pointer, porting, postern, posting, pronest, protein, pterins, regions, repoint, resting, ropiest, sorting, sponger, sporing, stinger, stonier, storing, triones