The word surrejoinders 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 surrejoinders
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Seven Letter Word Alert: (55 words)
deniers, denoise, dernier, derries, desirer, desires, dossier, dousers, dresser, endorse, endures, ensured, ensurer, ensures, indorse, injured, injurer, injures, insured, insurer, insures, ironers, joinder, joiners, juniors, nerdier, nursers, orderer, redness, redress, redries, reissue, rejoins, renders, reorder, rerinse, resends, resider, resides, residue, resound, rinsers, rosined, rounder, senders, seniors, serious, snorers, soirees, sorrier, sounder, sudsier, sunrise, undoers, undress