The word copyholders 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: 23
Highest Scoring Words With Friends™ Play In The Letters copyholders
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Seven Letter Word Alert: (33 words)
chooser, cloyers, coolers, creosol, croodle, cyphers, decolor, deploys, holders, hydrops, leprosy, lycopod, opcodes, polyose, pooched, pooches, poodles, porched, porches, precool, presold, prosody, psyched, respool, schorly, scolder, scooped, scooper, spooled, spooler, spoored, spyhole, yodlers