The word abecedarians 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 abecedarians
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Seven Letter Word Alert: (71 words)
abiders, abrades, abraids, abrased, abscind, absence, acrasid, airbase, airbeds, aniseed, arabise, arcades, arcsine, arsenic, ascarid, ascribe, beadier, beanies, bedares, benders, bendier, binders, brained, braised, cairned, canards, candies, carbeen, carbene, carbide, carbine, careens, carinae, carnies, cinders, creased, dancers, dearies, debaser, decanes, decarbs, decares, decries, deicers, deniers, derbies, diabase, discern, encased, endears, inbreds, inbreed, incased, radians, radices, readies, rebased, rebinds, recaned, recanes, rescind, sabered, sandbar, sandier, sardine, scabrid, scribed, seabird, sidebar, sidecar, sincere