The word transgressor 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: 15
Highest Scoring Words With Friends™ Play In The Letters transgressor
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Seven Letter Word Alert: (50 words)
argents, arrests, assents, asserts, assorts, atoners, engross, errants, garners, garnets, garrets, garters, gassers, granter, grasses, graters, groaner, grosser, grosses, onstage, oranger, oranges, ornater, rangers, ranters, rasters, reasons, regrant, reroast, resorts, roarers, roaster, rosters, seasons, senator, sensors, snarers, snorers, snorter, soarers, sorters, stagers, starers, stoners, storage, strange, tensors, terrors, tossers, treason