The word spellbinders 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: 22
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (86 words)
bedless, bedress, bellied, bellies, benders, bendier, besides, binders, blender, blessed, blesser, blinder, blissed, bridles, brindle, deniers, depress, derbies, desires, despise, diesels, dispell, dispels, edibles, eldress, ellipse, endless, illbred, illness, inbreds, inbreed, lenders, libeled, libeler, lidless, linseed, lipless, lispers, penises, periled, pieless, pinless, prebend, prebill, presell, preside, pressed, rebells, rebills, rebinds, reblend, rebless, redline, redness, relined, relines, repiled, repiles, repined, repines, replied, replies, resells, resends, resides, respell, respins, ribless, ripened, sellers, senders, sidlers, slender, sliders, snipers, spelled, speller, spender, spiders, spilled, spiller, spindle, spinels, spleens, splined, splines