The word unresponsive 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 unresponsive
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Seven Letter Word Alert: (62 words)
ensures, enviers, envious, environ, erosive, espouse, insures, inverse, nervous, neurons, nonuser, oneness, openers, overuse, penises, penners, pennies, pension, pensive, peonies, persons, peruses, pinenes, pioneer, poesies, poseurs, prevues, prisons, punners, punnier, purines, pussier, reissue, reopens, repines, reposes, respins, reunion, revises, seniors, serious, sinners, snipers, soirees, soupier, spinner, spinons, spinose, spinous, sunnier, sunnies, sunrise, suspire, unnerve, unrisen, uprisen, uprises, venison, versine, version, vespers, viruses