The word trifurcating 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 trifurcating
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Seven Letter Word Alert: (26 words)
carting, catting, crating, currant, curring, curtain, cutting, fairing, firring, fitting, frantic, furring, infarct, ingraft, rafting, ratting, rifting, rutting, tantric, tarring, tauting, titanic, tracing, tufting, turfing, ungraft