The word monochromatism is playable in Words With Friends™, but 1 blank substituting for the letter 'm' 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: 25
Highest Scoring Words With Friends™ Plays In The Letters monochromatism
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Seven Letter Word Alert: (53 words)
actions, ammonic, anchors, archons, atomics, atomism, atonics, cahoots, cantors, cartons, cartoon, cations, chamois, chariot, chorion, chroman, citrons, cohorts, commits, commons, consort, coronas, cratons, crimson, haricot, mammons, mammoth, marconi, marmots, maroons, martins, masonic, matrons, microhm, microns, monarch, monitor, monocot, moorish, moronic, motions, omicron, oration, osmotic, ostrich, racoons, rations, rhotics, scotoma, somatic, stomach, tarnish, torsion