The word unsufferable 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 unsufferable
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Seven Letter Word Alert: (38 words)
auburns, baffler, baffles, baleens, baneful, bluffer, buffers, bureaus, earfuls, enabler, enables, fearful, flenser, fuelers, funeral, furanes, leaners, nebulae, nebular, nebulas, neurula, raffles, rebales, rebluff, rebuffs, refuels, refusal, ruffles, snaffle, snuffer, snuffle, subrule, unbales, unblurs, unfurls, unreels, urnfuls, useable