The word insufferable 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: 24
Highest Scoring Words With Friends™ Play In The Letters insufferable
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Seven Letter Word Alert: (70 words)
affines, baffler, baffles, baleens, baneful, beanies, beliefs, bluefin, bluffer, buffers, buffier, burials, earfuls, enabler, enables, faeries, failure, fearful, febrile, felines, fibulae, fibular, finales, flenser, freesia, friable, frisbee, fuelers, funeral, funfair, furanes, fusible, infuser, insular, inulase, leafier, leaners, leisure, lesbian, nailers, nebulae, nebular, nebulas, raffles, realise, rebales, rebluff, rebuffs, refiles, refines, reflies, refuels, refusal, reliefs, relines, renails, ruffian, ruffles, sealife, snaffle, sniffer, sniffle, snuffer, snuffle, suberin, subrail, unbales, unreels, urinals, useable