The word clockmakers is playable in Words With Friends™, but 1 blank substituting for the letter 'k' 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: 24
Highest Scoring Words With Friends™ Play In The Letters clockmakers
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Seven Letter Word Alert: (26 words)
armlock, cackler, cackles, carlock, clamors, clocker, coakers, coalers, cockals, crackle, earlock, escolar, lockers, mackles, mockers, morales, oracles, recloak, reclock, recoals, recocks, relocks, seacock, slacker, smacker, solacer