The word timberlines 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: 19
Highest Scoring Words With Friends™ Play In The Letters timberlines
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Seven Letter Word Alert: (47 words)
bemires, beslime, betimes, betrims, bitsier, blister, bristle, elitism, entries, interim, itemise, lenites, limbers, limiter, lintier, melters, metrise, minters, mintier, mistier, nimbler, rebites, reblent, reemits, relents, relines, remelts, remines, remints, resmelt, retiles, retimes, riblets, risible, siltier, slimier, smelter, smilier, sterile, tensile, termini, timbers, timbrel, timbres, trebles, tremble, trienes