The word reversioners 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: 17
Highest Scoring Words With Friends™ Play In The Letters reversioners
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Seven Letter Word Alert: (26 words)
enviers, erosive, inverse, ironers, nervier, oversee, renerve, rerinse, reserve, reveres, reverie, reverse, reviser, revises, rinsers, seniors, serener, servers, severer, sneerer, snorers, soirees, sorrier, veneers, versine, version