The word musclebuilder 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 musclebuilder
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Seven Letter Word Alert: (80 words)
becurls, bellied, bellies, bemired, bemires, bemused, beslime, bridles, bruised, builder, bullied, bullies, ceriums, climbed, climber, cruised, crumbed, crumble, curdles, curiums, decibel, deciles, decries, decrumb, deicers, delimbs, delimes, derbies, deslime, duelers, dueller, edibles, eluders, emulsic, erbiums, illbred, illumed, imburse, leisure, leucism, libeled, libeler, limbers, lumbers, mercies, micelle, millers, miscued, misrule, mullers, muscled, rebells, rebills, rebuild, reclimb, recluse, recused, reduces, rescued, residue, reslice, resumed, rumbled, rumbles, scribed, seclude, secured, seducer, sluiced, sluicer, slumber, smelled, smeller, subcell, subduce, subduer, sublime, subrule, sullied, ulcered