The word disburdened 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: 19
Highest Scoring Words With Friends™ Play In The Letters disburdened
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Seven Letter Word Alert: (38 words)
bedders, bedside, benders, bendier, bidders, binders, bruised, budders, buddied, buddies, burdens, debride, debused, deniers, denuded, denuder, denudes, derbies, derided, derides, desired, dresden, enbused, endured, endures, ensured, inbreds, inbreed, insured, rebinds, reddens, resided, residue, ruddied, ruddies, suberin, sunbird, undried