The word overbalancing 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: 28
Highest Scoring Words With Friends™ Play In The Letters overbalancing
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Seven Letter Word Alert: (95 words)
abalone, acerval, aeolian, aerobic, aileron, airable, alanine, algebra, aligner, angelic, anginal, avarice, balance, banaler, bargain, bearing, begonia, binocle, blaring, bolivar, bonnier, bracing, brangle, braving, cabling, caliber, calibre, calorie, calving, cannier, cannoli, carbine, carinae, carinal, carnage, carving, carvone, caviler, clangor, clarion, clavier, clinger, cloning, coalbag, coalbin, coalier, coaling, coinage, congeal, connive, coreign, corneal, corning, cranial, craning, craving, earning, environ, glacier, glancer, gracile, granola, ignoble, ironage, lancing, leaning, learing, leaving, loaning, nanogel, nearing, nerving, nirvana, nonevil, nonliar, nonreal, obliger, onliner, organic, ovarian, realign, reavail, reaving, reclang, regalia, ribcage, roaning, vaginal, valance, variola, vearing, velaria, velaric, vinegar, vocable