The word palingenesis 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: 20
Highest Scoring Words With Friends™ Play In The Letters palingenesis
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Seven Letter Word Alert: (65 words)
ageless, aisling, alpeens, alpines, aniline, asinine, elapses, engines, enseals, ensigns, gapless, genesis, genials, gipsies, inlines, lapsing, leaning, leaping, leasing, lensing, liaises, ligases, lignins, lineage, linings, lipases, lisping, nailing, napless, paining, palsies, pansies, passing, pealing, peeling, pegless, penises, pennies, pieless, pilings, pinenes, pingles, pinless, planing, pleases, sailing, salines, sapling, sealing, seeping, sensing, siennas, signals, signees, silanes, singles, sniping, spangle, spaniel, spelean, spiegel, spinals, spinels, spleens, splines