The word chronoscopes 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 chronoscopes
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Seven Letter Word Alert: (26 words)
censors, chooser, chooses, cocoons, conches, corpses, hencoop, noosers, onshore, oophore, ooscope, oospore, operons, persons, ponchos, pooches, porches, poroses, process, sconces, scooper, scrooch, snooper, soccers, sooners, sponsor