The word unflattering 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: 21
Highest Scoring Words With Friends™ Play In The Letters unflattering
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Seven Letter Word Alert: (97 words)
aligner, annulet, antigen, earning, elating, eluting, engraft, entrain, entrant, failure, fainter, fatigue, fattier, fearing, felting, figural, finagle, fireant, flaring, flatten, flatter, fluting, flutter, fragile, frigate, fueling, funeral, fungate, funnier, furling, gainful, gaunter, gelatin, genital, gentian, glitter, granite, granule, gruntle, guanine, gunfire, inflate, ingraft, ingrate, lantern, latrine, leafing, leaning, learing, letting, nattier, nearing, netting, neutral, nitrate, nuttier, nutting, rafting, rageful, ranting, ratline, ratting, realign, refutal, regnant, reliant, renting, retinal, ringlet, rutting, tagline, tailgun, tangent, tangier, taunter, tauting, tearful, tearing, tenting, tertial, tingler, titular, trenail, trunnel, tuftier, tufting, turfing, turning, unagile, unalert, unalign, unalter, unearnt, ungraft, unlearn, uralite, urinate