The word factorising 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™ Plays In The Letters factorising
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Seven Letter Word Alert: (56 words)
actions, agnosic, agonist, airings, arising, atonics, cantors, carting, cartons, casting, cations, citrons, coating, confits, costing, crating, cratons, facings, faction, factors, fairing, fasting, fiction, firings, forcing, forints, frantic, gastric, gastrin, gnostic, iconist, ignitor, incisor, infarct, ingraft, insofar, nicosia, orating, organic, origins, rafting, raising, ratings, rations, rifting, rioting, satiric, scaring, scoring, sifting, signora, soaring, sorting, staring, storing, tracing