The word blackmailers 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: 27
Highest Scoring Words With Friends™ Play In The Letters blackmailers
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Seven Letter Word Alert: (79 words)
aerials, airable, airbase, aircell, alkalic, alkalis, amblers, ambries, ambsace, amiable, arabise, armlike, ascribe, backers, balkers, balkier, balmier, basilar, bickers, bilkers, blacker, blamers, braille, cablers, caliber, calibre, callers, cambers, cambial, cameras, caramel, cellars, claimer, clamber, clarkia, climber, eclairs, embarks, iceball, kalimba, karimba, killers, labials, liberal, lickers, likable, limbers, macabre, mackles, mailcar, mailers, malaise, malices, marbles, micella, milkers, millers, miracle, miscall, rallies, rambles, realism, rebacks, rebills, recalls, reclaim, reclimb, remails, reskill, saclike, salable, scalier, scleral, scribal, skiable, slacker, slicker, smacker, smaller