The word counterweight 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: 25
Highest Scoring Words With Friends™ Play In The Letters counterweight
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Seven Letter Word Alert: (82 words)
cheerio, chewier, chewing, choregi, choring, cithern, cittern, coreign, cornett, coterie, cougher, counter, cowrite, crowing, curette, cutting, echoing, eighter, enteric, enticer, etching, etheric, eugenic, generic, genetic, gothite, goutier, gutwort, heretic, heroine, hurting, hutting, integer, neither, notcher, nowhere, nuttier, outgrew, outgrin, outhire, recount, rehinge, retouch, retwine, reunite, reweigh, rotting, roughen, routine, routing, rutting, tentier, therein, thereon, thereto, thorite, tighten, tighter, tonight, toucher, toughen, tougher, toughie, touring, touting, treeing, trochee, trounce, tutoree, unerect, uterine, weigher, wetting, wherein, whereon, whereto, whinger, wincher, witcher, without, written, wrought