The word dichotomisation 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: 25
Highest Scoring Words With Friends™ Play In The Letters dichotomisation
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Seven Letter Word Alert: (53 words)
actions, animist, atomics, atonics, cahoots, cations, catmint, chamois, coadmit, comonad, condoms, conidia, cottons, diatoms, diction, diosmin, discant, distant, domains, domatic, dominos, dotcoms, hominid, iconism, iconist, idiotic, indicts, isodont, manhood, masonic, mastoid, miscoin, mitotic, monocot, monoids, moschid, motions, nicosia, nomadic, octants, osmotic, ottoman, scotoma, sodomic, somatic, somitic, station, stomach, thiamin, titanic, toadish, tomatos, tomcats