The word deflagrating 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: 22
Highest Scoring Words With Friends™ Play In The Letters deflagrating
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Seven Letter Word Alert: (91 words)
adrenal, agatine, aggrade, airdate, aligned, aligner, dangler, darling, darting, dealign, dealing, defiant, deraign, detrain, dilater, dragnet, elating, engraft, fainted, fainter, fantail, fearing, felting, finagle, fireant, flagged, flagger, flanged, flaring, flirted, fragile, frigate, fringed, ganglia, garaged, gargled, garland, gearing, gelatin, gelding, genital, glaring, glinted, gnarled, gradate, grading, grafted, grained, granite, granted, grating, indraft, inflate, ingraft, ingrate, laggard, larding, latrine, leading, leafing, learing, ledging, ligated, niggler, radiant, radiate, rafting, ratline, reading, realign, regalia, reliant, retinal, ringlet, taggier, tagline, tailfan, tanager, tangier, tangled, tearing, tendril, tiaraed, tingled, tingler, tradein, trading, trailed, trained, trenail, trifled