The word phoradendrons 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 phoradendrons
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Seven Letter Word Alert: (62 words)
adhorns, adorers, adorned, adorner, danders, darners, dehorns, dendron, deodars, desnood, despond, drapers, drooped, eardrop, endopod, errands, hadrons, handers, hardens, harpers, harpoon, headons, hoarded, hoarder, hoarser, honored, honorer, nanorod, nephron, nodders, nonhero, nonpros, onshore, operand, operons, orphans, padders, panders, pardons, persona, phonons, phrased, phraser, podands, ponders, prodder, readorn, rehonor, respond, rodders, sharped, sharpen, sharper, snooded, snooped, snooper, soprano, spanned, spanner, sparred, spooned, spoored