The word hazardousness 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: 27
Highest Scoring Words With Friends™ Play In The Letters hazardousness
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Seven Letter Word Alert: (36 words)
adhorns, aroused, arouses, assured, assures, asunder, dashers, dehorns, dharnas, dousers, hadrons, handers, hardens, harness, hazards, headons, housane, reasons, resands, resound, sadness, sanders, seasons, sensors, shaders, shrouds, sounder, sudsers, sundaes, undoers, undress, unheard, unhorse, unshare, unshoed, zanders