The word chimneysweeper 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: 31
Highest Scoring Words With Friends™ Play In The Letters chimneysweeper
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Seven Letter Word Alert: (75 words)
cephems, chewers, chewier, chimere, chimney, chrysin, ciphers, crewmen, crispen, cyphers, empires, enemies, epicene, epimers, hymners, inchers, mercies, meshier, mincers, misween, nephews, newsier, nymphic, peewees, perches, phrenic, phrensy, pierces, pincers, pincher, pinches, precise, preemie, premise, presync, princes, rechews, rechime, recipes, remines, repines, reshine, respice, resweep, rewipes, scenery, schemer, screeny, scrimpy, seepier, shipmen, shrimpy, sincere, spermic, spewier, sphenic, spheric, spicery, sweeper, weenier, weepers, weepier, weiners, wenches, wherein, whimper, whimsey, whiners, whisper, wieners, wincers, wincher, winches, wiremen, wisemen