The word biodegrading 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: 22
Highest Scoring Words With Friends™ Play In The Letters biodegrading
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Seven Letter Word Alert: (62 words)
abidden, abiding, aboding, abridge, adenoid, adoring, adorned, android, aneroid, angioid, badging, baggier, barging, beading, bearing, bedding, begonia, bidding, birddog, birding, boarded, boggier, bondage, bragged, braided, brained, branded, bridged, brigade, broaden, dandier, denarii, deraign, dingier, dodgier, dodging, dragged, drained, eroding, garbing, gearing, geogrid, giddier, girding, goading, grading, grained, grinded, groaned, groined, ignored, inboard, ironage, negroid, radioed, raiding, reading, redoing, ridding, ridging, roadbed, rodding