The word trifurcation 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: 20
Highest Scoring Words With Friends™ Play In The Letters trifurcation
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Seven Letter Word Alert: (21 words)
auction, carrion, caution, citator, curator, currant, curtain, faction, fiction, frantic, functor, infarct, outrant, rainout, rancour, ricotta, tantric, titanic, tractor, traitor, tuition