The word progressivisms 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: 26
Highest Scoring Words With Friends™ Plays In The Letters progressivisms
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Seven Letter Word Alert: (34 words)
egoisms, gimpier, gipsies, gossips, grimier, gripers, gropers, grosser, grosses, grovers, imposer, imposes, impress, improve, isomers, ivories, meiosis, misgive, mossier, pigmies, pissier, possess, premiss, primers, promise, provers, regrips, resorps, rompers, simpers, sissier, sissies, verismo, verisms