The word progymnosperm 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™ Plays In The Letters progymnosperm
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Seven Letter Word Alert: (32 words)
eponyms, ergonym, geonyms, groomer, gropers, gyppers, meronym, mongers, mongery, monomer, moppers, myogens, oosperm, operons, opposer, orogens, orogeny, oronyms, pompoms, poopers, progeny, propmen, propose, propyne, prosper, pyrones, pyropes, regroom, rompers, roomers, snooper, sponger