The word undistinguished 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: 25
Highest Scoring Words With Friends™ Play In The Letters undistinguished
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Seven Letter Word Alert: (76 words)
degusts, denting, dentins, designs, dieting, digests, dingies, dinting, disgust, dishing, dissent, dissing, distend, disused, dunites, dusting, editing, endings, ensigns, ensuing, gussied, hidings, hindgut, hinnies, hinting, hissing, hunting, husting, ignited, ignites, indents, indited, indites, ingests, insides, insight, intends, issuing, nesting, nightie, nudists, sending, sensing, shindig, shining, shinned, shunned, shunted, shutins, sidings, sighted, signets, snidest, snudged, snudges, studied, studies, stunned, suddens, sudsing, suiting, sunnies, tending, tensing, thinned, tidings, tissued, tunings, undents, undined, undines, unguent, unhinge, unities, uniting, untuned