The word blackberrying 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: 32
Highest Scoring Words With Friends™ Play In The Letters blackberrying
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Seven Letter Word Alert: (83 words)
aligner, angelic, angrier, angrily, babying, backing, baglike, bairnly, balkier, balking, barbing, bargirl, barking, barring, bearing, bilayer, blacken, blacker, blaring, blarney, blinker, bracing, bracken, braking, brangle, braying, breakin, bribery, bringer, byliner, cabling, caliber, calibre, carbine, clayier, clinger, clinker, crabber, crabier, cranker, cribber, cribble, cringer, crinkle, crinkly, earring, gabbier, gabbler, garbler, garrick, glacier, glancer, glibber, glycine, gnarler, grabber, grabble, gracile, grackle, grainer, inlayer, keyring, lacking, lankier, larceny, larking, leaking, learing, library, linkage, nibbler, racking, rangier, raylike, reaking, realign, rearing, recking, reclang, relying, ribcage, yacking, yealing