The word daggerboards 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: 21
Highest Scoring Words With Friends™ Plays In The Letters daggerboards
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Seven Letter Word Alert: (37 words)
abraded, abrader, abrades, abrased, abraser, adorers, agarose, aggrade, arbored, badgers, barrage, beggars, boarded, boarder, bodegas, borages, borders, bragged, bragger, broader, daggers, deodars, dodgers, dogears, dragged, dragger, garaged, garages, garbage, graders, ragbags, reboard, redrags, regards, regrabs, roadbed, rodders