The word nonparasitic 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 nonparasitic
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Seven Letter Word Alert: (51 words)
actions, anaptic, anionic, anoints, apricot, arctans, artisan, aspirin, atonias, atonics, atropia, cantons, cantors, cantrap, cantrip, capstan, captain, caption, captors, cartons, cations, catnaps, catnips, citrons, contain, cratons, iconist, incants, incisor, introns, nations, niacins, nicosia, nonarts, patinas, patrons, pianist, piarist, pinions, prosaic, psionic, rations, saponin, satanic, satiric, spartan, stannic, tapioca, tarpans, tropics, tsarina