The word branchlets 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: 20
Highest Scoring Words With Friends™ Play In The Letters branchlets
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Seven Letter Word Alert: (46 words)
anthers, antlers, archlet, banters, batches, bathers, benthal, blaster, blather, breaths, cablers, canters, cantles, cartels, central, chalets, chanter, chasten, chaster, clarets, clasher, enthral, halters, herbals, lancers, lancets, larches, latches, lathers, nectars, ranches, rebatch, rebaths, reblast, recants, rentals, reslant, saltern, satchel, scanter, scarlet, slather, stabler, sternal, trances, tranche