The word wonderberries 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™ Plays In The Letters
Seven Letter Word Alert: (95 words)
bedewer, bedsore, benders, bendier, berried, berries, binders, binodes, birders, borders, boreens, bowered, breeder, brewers, browned, browner, brownie, browsed, browser, deboner, debones, deniers, denoise, derbies, dernier, derries, desirer, dewires, disrobe, downers, downier, dowries, ebonies, endorse, enrobed, enrober, enrobes, inbreds, inbreed, indorse, ironers, needers, needier, nerdier, newbies, newsier, orderer, oreweed, rebinds, rebonds, rebored, rebores, rebreed, redries, reedier, reendow, renders, renewed, renewer, reorder, rerinse, resewed, resider, resowed, reswore, rewinds, rewired, rewires, rewords, rosined, rowdier, rowdies, seedier, serener, sinewed, sneered, sneerer, snowier, sobered, soberer, sorrier, weeders, weedier, weenier, weiners, weirder, weirdos, widener, wieners, winders, wonders, wordier, worried, worrier, worries