The word countermoves 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 countermoves
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Seven Letter Word Alert: (68 words)
cements, cenotes, censure, centers, centres, cerumen, consort, consume, contour, convert, cornets, coronet, costume, counter, coverts, coveter, crouton, cumenes, cutover, ecotour, emoters, encores, encrust, estrone, mentors, meronts, meteors, monster, mounter, muscone, necrose, nervous, neuters, nostrum, octenes, onerous, outcome, outmove, overcut, overset, overuse, recount, rectums, remotes, remount, removes, retunes, revotes, ruesome, scenter, scooter, scouter, scrotum, someone, sternum, sunroom, tenures, tonsure, trounce, tumesce, uncover, unerect, unreset, urosome, vectors, venture, vetoers, voteens