The word abecedariuses 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™ Play In The Letters abecedariuses
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Seven Letter Word Alert: (97 words)
abasers, abduces, abiders, abrades, abraids, abrased, abrases, abscise, abusers, acrasid, airbase, airbeds, arabise, arcades, ascarid, ascribe, assured, beadier, because, bedares, bedress, besides, biassed, braised, braises, brassed, bruised, bruises, carbide, causers, cerises, creased, creases, cruised, cruises, crusade, daubers, dearies, debaser, debases, debuses, decarbs, decares, decease, decrees, decries, deicers, derbies, desires, diabase, disbars, discase, disease, radices, readies, rebased, rebases, recedes, recused, recuses, reduces, reissue, rescued, rescues, reseeds, resides, residue, sabered, saucers, saucier, scabies, scabrid, scarabs, screeds, scribed, scribes, seabeds, seabird, seaside, seceder, secedes, secured, secures, seducer, seduces, seeders, seedier, sidebar, sidecar, subarea, subcase, subrace, subside, sucrase, sudsier, ureases, uricase