The word dichotomised 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: 22
Highest Scoring Words With Friends™ Play In The Letters dichotomised
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Seven Letter Word Alert: (36 words)
chemist, coedits, comedos, cooties, deciohm, deistic, demotic, desmoid, diciest, dietics, discoid, disodic, ditched, ditches, dotcoms, ethmoid, hoisted, homiest, iodides, iodised, iodites, meiotic, methods, miscite, miscode, misedit, mooches, moschid, osmotic, osteoid, scooted, sodomic, somitic, soothed, stimied, toddies