The word hypotenuses 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 hypotenuses
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Seven Letter Word Alert: (31 words)
enthuse, eophyte, espouse, ethynes, euphony, eyeshot, eyespot, heptose, heptyne, honesty, hotness, neotype, onestep, openest, outsees, pentose, phoneys, poetess, poteens, potheen, pythons, shuteye, sphenes, stenose, stepson, sunspot, syphons, toupees, unstops, upshots, youthen