The word hammerlocks 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: 27
Highest Scoring Words With Friends™ Play In The Letters hammerlocks
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Seven Letter Word Alert: (40 words)
armhole, armlock, chokers, cholera, chorale, chorals, chromel, chromes, clammer, clamors, clasher, coakers, coalers, earlock, escolar, hackers, hackles, hammers, hammock, hemlock, larches, lockers, mackles, marches, mockers, morales, oracles, rechalk, recloak, recoals, relocks, roaches, scholar, shackle, shammer, shocker, slacker, slammer, smacker, solacer