The word counterchecks is playable in Words With Friends™, but 1 blank substituting for the letter 'c' is 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: 26
Highest Scoring Words With Friends™ Plays In The Letters counterchecks
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Seven Letter Word Alert: (80 words)
cenotes, censure, centers, centres, checker, chokers, chouser, chucker, cockets, coerces, coheres, concert, conches, concurs, conkers, cornets, couches, counter, creches, crochet, echoers, encores, encrust, enthuse, estrone, etchers, heteros, hornets, hunkers, hunters, ketones, necrose, neuters, notcher, notches, octenes, recheck, rechose, rechunk, reckons, recocks, recount, rehones, rehouse, reknots, restock, restoke, restuck, retches, retouch, retunes, rockets, scenter, scouter, screech, scrunch, shocker, shorten, shouter, shucker, shunter, stocker, tenures, thereon, thrones, tonsure, torches, toucher, touches, trochee, trounce, tuckers, uncheck, unchoke, uncocks, uncorks, unerect, unhorse, unreset, unstock