The word watchmakers 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: 26
Highest Scoring Words With Friends™ Play In The Letters watchmakers
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Seven Letter Word Alert: (33 words)
acaters, awakest, cameras, carwash, chaster, hackers, hacksaw, hamster, hatrack, hawkers, kwachas, marches, markets, matcher, matches, rackets, rematch, restack, retacks, rethaws, rewatch, seahawk, smacker, stacker, tackers, tarmacs, thwacks, trachea, warmest, warmths, watcher, watches, wreaths