The word epidendrons 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 epidendrons
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Seven Letter Word Alert: (46 words)
dendron, deniers, denoise, depends, deponed, depones, deposed, deposer, depside, derides, desired, despond, dinners, dispend, dresden, endorse, episode, indorse, nodders, nondeep, nondrip, openers, penners, pennies, pension, peonies, periods, pinenes, pioneer, ponders, preside, reddens, reopens, repined, repines, reposed, resided, respond, ripened, rosined, seedpod, soddier, spender, spinner, spinode, spondee