The word undisturbed 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 undisturbed
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Seven Letter Word Alert: (40 words)
bedirts, bestrid, bidders, binders, bruised, budders, buddies, burdens, bustier, distend, disturb, dunites, dustbin, dustier, inbreds, insured, intrude, nutsier, rebinds, ruddies, rudites, studied, studier, subdued, subduer, subedit, suberin, subtend, subunit, sunbird, sutured, tinders, tribune, turbine, unburst, undrest, undried, uniters, untired, untried