The word paroxytones 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: 24
Highest Scoring Words With Friends™ Play In The Letters paroxytones
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Seven Letter Word Alert: (29 words)
apteryx, atoners, axstone, entraps, entropy, exports, operant, operons, oxytone, panters, parents, patrons, persona, poorest, postern, pretans, pronate, pronest, protean, protons, pyrones, seaport, senator, snooper, soprano, sporont, stooper, treason, trepans