The word proparoxytones 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: 30
Highest Scoring Words With Friends™ Play In The Letters proparoxytones
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Seven Letter Word Alert: (85 words)
apposer, apteryx, atoners, axstone, entraps, entropy, errants, exports, nappers, oospore, operant, operons, opposer, orators, oratory, ornater, oxytone, panters, papoose, parents, parrots, partner, patrons, persona, petnaps, poopers, poorest, porters, portray, postern, praetor, praters, prayers, prepays, presort, pretans, pronate, pronest, propane, propose, propoxy, propyne, prorate, prosper, protean, protons, pyrones, pyropes, ranters, rappers, rapport, raptors, reports, reprays, reroast, reroots, respray, restrap, retraps, roaster, rooster, rooters, seaport, senator, snapper, snooper, snorter, soprano, sporont, sprayer, stooper, stopper, strappy, strayer, stroppy, tappers, ternary, toppers, toprope, torpors, trapper, treason, trepans, trooper, yappers