The word colpocystitis 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: 25
Highest Scoring Words With Friends™ Play In The Letters colpocystitis
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Seven Letter Word Alert: (32 words)
clitics, colitis, colossi, copilot, copyist, cyclist, cyclops, cytosis, cytosol, oocysts, oocytic, oolitic, otocyst, piccolo, pistils, pistols, politic, postils, solicit, soloist, sootily, spicily, spotlit, stylist, stylops, styptic, tictocs, tipsily, topsoil, tosspot, tylosis, typists