The word slaughtered 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: 18
Highest Scoring Words With Friends™ Play In The Letters slaughtered
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Seven Letter Word Alert: (91 words)
adheres, alerted, altered, auletes, austere, dealers, dearest, dearths, delates, deluges, desugar, draught, duelers, dustrag, eaglets, earthed, elaters, eluated, eluates, eluders, estrual, euaster, gathers, gearset, gelated, gelates, gelders, gesture, greased, guested, haglets, hagseed, halters, hardest, hatreds, haulers, headers, headset, healder, healers, hearsed, hearted, heaters, hedgers, heralds, hurdles, hurtled, hurtles, hustled, lagered, largest, lathers, laughed, laugher, leaders, leadeth, leagued, leaguer, leagues, leashed, leather, ledgers, legates, realest, reasted, redates, redeals, redealt, reglued, reglues, reheats, related, relates, restage, rustled, saluted, saluter, sauteed, sedater, sheared, shelter, slather, stealer, strudel, sugared, tasered, threads, trashed, treadle, trudges, ushered