The word postmodern 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: 18
Highest Scoring Words With Friends™ Play In The Letters postmodern
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Seven Letter Word Alert: (38 words)
deports, doormen, endmost, mentors, meronts, moderns, monster, mordent, motored, oosperm, operons, optrode, ponders, poorest, portend, postern, postmen, promote, pronest, protons, respond, rodents, roosted, snooped, snooper, snooted, snorted, spooned, spoored, sporont, sported, stomped, stomper, stooped, stooper, stormed, torpedo, trooped