The word scaremonger 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: 20
Highest Scoring Words With Friends™ Play In The Letters scaremonger
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Seven Letter Word Alert: (54 words)
acerose, amercer, amerces, anomers, canoers, careens, careers, cargoes, coarsen, coarser, corneas, corners, corsage, creamer, creaser, earners, enamors, encores, enrages, garners, genomes, germane, greaser, groaner, grocers, mangers, mangoes, meagrer, menaces, menages, mercers, mergers, moaners, mongers, necrose, negroes, oarsmen, oranger, oranges, racemes, rancors, rangers, reamers, rearose, recanes, regears, remorse, renames, rescore, roamers, romance, scorner, seagoer, smearer