The word polypropenes is playable in Words With Friends™, but 1 blank substituting for the letter 'p' is 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™ Plays In The Letters polypropenes
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Seven Letter Word Alert: (25 words)
elopers, leprosy, loppers, openers, operons, opposer, peoples, peppers, peppery, polyose, poopers, popeyes, poppers, pronely, propels, propene, propose, propyne, pyrones, pyropes, reopens, respool, snooper, spooler, yelpers