The word chronometers 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: 21
Highest Scoring Words With Friends™ Play In The Letters chronometers
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Seven Letter Word Alert: (80 words)
cements, cenotes, centers, centres, chooser, chromes, coherer, coheres, cohorts, consort, corners, cornets, coroner, coronet, crooner, echoers, emoters, encores, erector, estrone, etchers, heteros, honoree, honorer, hormone, hornets, mentors, mercers, meronts, meteors, monster, moocher, mooches, moorhen, mothers, necrose, norther, notcher, notches, octenes, onshore, rechose, rectors, rehomes, rehones, rehonor, remorse, remoter, remotes, renters, rerents, reroots, rescore, reshoot, reshore, restore, retches, rhetors, roomers, rooster, rooters, scenter, schemer, scooter, scorner, shooter, shorten, shorter, smother, snorter, someone, soother, sterner, theorem, thereon, thermos, thrones, torches, tremors, trochee