The word lumberyards 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 lumberyards
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Seven Letter Word Alert: (41 words)
abludes, amblers, barleys, barrels, bedlams, bedlars, belauds, beldams, bemauls, blamers, blurred, brayers, burlers, bursary, daubers, daubery, deburrs, durable, durably, eardrum, larders, lumbers, marbled, marbler, marbles, maulers, medusal, murders, rambled, rambler, rambles, ruderal, rumbaed, rumbled, rumbler, rumbles, serumal, slumber, slurred, surreal, useably