The word biodegrades 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: 18
Highest Scoring Words With Friends™ Play In The Letters biodegrades
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Seven Letter Word Alert: (53 words)
abiders, abridge, airbeds, badgers, beadier, bearded, bedared, bedares, bedders, bedside, bedsore, bidders, birddog, boarded, bodegas, borages, braided, braised, breaded, bridged, bridges, brigade, deaired, dearies, debased, debaser, debride, degrade, deodars, derbies, derides, desired, disrobe, dodgers, dodgier, dogears, dredges, greased, radioed, readied, readies, rebadge, rebased, resided, roadbed, roadies, sabered, seabird, seagoer, sedgier, sidebar, sobered, soddier