The word unhurriedness 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™ Play In The Letters unhurriedness
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Seven Letter Word Alert: (57 words)
deniers, dernier, derries, desirer, desires, dinners, dresser, endures, ensured, ensurer, ensures, heiress, herders, herdess, hinders, hurried, hurries, insured, insurer, insures, nerdier, nursers, redness, redress, redries, rehides, rehired, rehires, reissue, renders, rerinse, resends, reshine, resider, resides, residue, rinsers, runners, runnier, rushers, senders, shiners, shinned, shrined, shrines, shunned, shunner, sinners, sudsier, sunnier, sunnies, sunrise, undines, undress, unrisen, ushered, usherer