The word slandering 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: 16
Highest Scoring Words With Friends™ Plays In The Letters slandering
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Seven Letter Word Alert: (70 words)
aligned, aligner, anglers, annelid, dangers, dangler, dangles, darling, darning, dealign, dealing, denials, deraign, derails, dialers, dinners, earning, endings, enlards, ensnarl, erasing, gainers, ganders, gardens, genials, gilders, girdles, girnels, gliders, gnarled, grained, grinned, inlands, innards, insaner, ladings, landers, landing, larding, leading, leaning, learing, leasing, lending, lensing, ligands, lindens, lingers, nailers, nearing, reading, realign, redials, regains, regilds, renails, rending, sandier, sanding, sardine, sealing, searing, sending, singled, slander, slanged, slinger, snailed, snaring, snarled