The word electroscope 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: 22
Highest Scoring Words With Friends™ Plays In The Letters electroscope
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Seven Letter Word Alert: (42 words)
coerces, colters, coolers, coolest, creoles, creosol, elector, elopers, looters, ocelots, pectose, peelers, pelters, petrels, petrols, poorest, precool, prelect, reclose, reelect, repeels, replete, replots, rescope, respect, respelt, respool, retools, roselet, scepter, sceptre, scooper, scooter, secrete, sleeper, specter, spectre, spooler, steeper, steeple, stooper, toolers