The word warmongers 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: 19
Highest Scoring Words With Friends™ Play In The Letters warmongers
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Seven Letter Word Alert: (29 words)
anomers, enamors, garners, gnawers, groaner, growers, mangers, mangoes, marrows, moaners, mongers, narrows, oarsmen, oranger, oranges, ragworm, rangers, regrown, regrows, reswarm, rewarms, roamers, seaworm, seaworn, swarmer, warmers, warners, wormers, wronger