The word gymnospermous 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: 28
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (53 words)
engross, eponyms, ergonym, euonyms, geonyms, grouses, gummose, gunroom, gurneys, gypsums, meronym, mongers, mongery, monomer, morgues, mossery, mousers, mungers, myogens, noosers, onerous, oogenus, oosperm, operons, opossum, orogens, orogeny, oronyms, ospreys, persons, poroses, poseurs, progeny, pyrones, sensory, sermons, snooper, sooners, soursop, sponger, sponges, sponsor, spurges, summers, summery, summons, sunroom, surgeon, unmessy, urnmoss, urosome, younger, youpons