The word lepidopteron 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™ Play In The Letters lepidopteron
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Seven Letter Word Alert: (72 words)
deplore, diopter, dioptre, doppler, droplet, eloined, epidote, epipole, epitope, inepter, lenited, loonier, loopier, nippled, optrode, penlite, pentode, peopled, peptide, peptone, peridot, periled, perlite, petiole, piloted, pioneer, pleopod, pointed, pointer, politer, portend, portion, preedit, prenote, prepend, preplot, pretend, printed, proline, propene, propine, protein, redline, redpole, relined, reoiled, repiled, repilot, repined, repiped, replied, repoint, reptile, retiled, retinol, ripened, rippled, ripplet, telopod, tendril, tepider, terpine, tippled, tippler, topline, toppled, toprope, torpedo, tripled, tripole, tripped, trooped