The word bellyachers 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 bellyachers
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Seven Letter Word Alert: (39 words)
barleys, beaches, belayer, belcher, belches, brashly, cablers, callers, cellars, cereals, cheerly, clasher, clearly, eyeball, eyebars, eyelash, healers, herbals, labeler, larches, leacher, leaches, lechers, lechery, lychees, reaches, rebales, rebells, recalls, relabel, relaces, rescale, sclerae, scleral, seeably, sheerly, shellac, sheller, yellers