The word vulnerability 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: 26
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (71 words)
ability, abluent, airline, alertly, bairnly, bilayer, biliary, blarney, blunter, bluntly, braille, bravely, brevity, bullate, byliner, eluvial, ilvaite, inertia, inertly, inlayer, inviter, irately, latrine, liberal, liberty, lintier, literal, livable, naively, naivety, nebular, netball, neutral, nullity, ratline, reality, rebuilt, reliant, retally, retinal, rivulet, rubella, tallier, tearily, tenably, trenail, triable, tribune, trivial, tunable, tunably, turbine, unalert, unalter, unitary, unlayer, unravel, unrivet, uralite, urinate, variety, vaulter, ventral, vibrant, vibrate, villain, virally, virtual, vitally, vitelli, vitrine