The word undesirably 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: 20
Highest Scoring Words With Friends™ Plays In The Letters undesirably
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Seven Letter Word Alert: (88 words)
abiders, abludes, airbeds, asunder, audible, audibly, bairnly, barleys, bedlars, bedrail, belauds, bilayer, binders, bindery, blander, blarney, blinder, blunder, brailed, brained, braised, bridals, bridles, brindle, bruised, builder, bundles, burdens, burials, bylined, byliner, bylines, daubers, daubery, denials, derails, dialers, dialyse, disable, diurnal, diynals, dualise, durable, durably, durians, dysuria, enlards, inbreds, inlayer, insular, insured, inulase, landers, launder, laundry, lesbian, nailers, nebular, nebulas, rabidly, randily, readily, rebinds, rebuild, redials, renails, sandier, sardine, seabird, sidebar, slander, snailed, snarled, snidely, suberin, subrail, sunbird, sundial, synurid, unaired, unbaled, unbales, unbraid, unideal, unlayer, unready, urinals, useably