The word planchettes 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: 21
Highest Scoring Words With Friends™ Plays In The Letters planchettes
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Seven Letter Word Alert: (45 words)
achenes, alpeens, athlete, cantles, caplets, chalets, chapels, chaplet, chasten, chattel, cheapen, chelate, cleanse, enclasp, etchant, ethanes, heeltap, heptane, lancets, latches, lateens, latents, leaches, leanest, neatest, nettles, palette, patches, patents, peaches, pectate, pectens, peltate, pencase, phenate, planets, satchel, scalene, septate, spelean, splatch, stealth, talents, teaches, telnets