The word lopsidednesses 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: 21
Highest Scoring Words With Friends™ Play In The Letters lopsidednesses
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Seven Letter Word Alert: (65 words)
deepend, deepens, denoise, depends, deponed, depones, deposed, deposes, depside, deseeds, despise, despoil, despond, diesels, dildoes, dipoles, dispels, dispend, dispose, eloined, endless, episode, epsilon, indoles, insoles, lesions, lessees, lessens, lessons, linseed, lioness, needled, needles, oddness, oilseed, oldness, osseins, peddles, penises, peonies, piddles, pieless, pinless, pleions, poesies, possess, seedpod, sessile, session, sinless, soddens, soddies, sodless, soliped, sonless, speeded, spindle, spinels, spinode, spinose, spleens, splined, splines, spoiled, spondee