The word provincialism 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 provincialism
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Seven Letter Word Alert: (38 words)
aspirin, avionic, campion, clamors, clarion, crampon, crimson, iconism, impairs, incisor, inclasp, liaison, lionism, lipomas, marconi, marlins, masonic, microns, miscoin, misplan, monilia, nicosia, normals, oilcans, plasmin, plasmon, polaric, prismal, prosaic, psalmic, psionic, ravioli, rosalic, silicon, similar, sirloin, violins, virions