The word parochialism 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: 24
Highest Scoring Words With Friends™ Play In The Letters parochialism
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Seven Letter Word Alert: (36 words)
achiral, acholia, airmail, airship, amorphs, amphora, aphasic, caliphs, camphor, carhops, carpals, chamois, chorals, clamors, haircap, impairs, impalas, ischial, isopach, lipomas, mailcar, marshal, morphic, pachisi, parasol, pariahs, phrasal, polaric, prismal, prosaic, psalmic, rosalic, sarcoma, scholar, similar, spacial