The word insufferably 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: 26
Highest Scoring Words With Friends™ Play In The Letters insufferably
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Seven Letter Word Alert: (63 words)
affines, baffler, baffles, bairnly, baneful, barleys, bilayer, blarney, bluefin, bluffer, briefly, buffers, buffier, burials, byliner, bylines, earfuls, failure, falsify, fearful, fibulae, fibular, finales, firefly, flayers, flybane, friable, funeral, funfair, furanes, fusible, infuser, inlayer, insular, inulase, lesbian, lubrify, nailers, nebular, nebulas, raffles, rebluff, rebuffs, refusal, renails, reunify, ruffian, ruffles, snaffle, sniffer, sniffle, sniffly, snuffer, snuffle, snuffly, suberin, subrail, unbales, unlayer, unleafy, urinals, useably, yearful