The word chairperson 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
Seven Letter Word Alert: (95 words)
anchors, archers, archons, arcsine, arsenic, arshine, aspirer, canoers, carhops, carnies, carpers, carries, carrion, cashier, chainer, charier, cheapos, chirper, ciphers, coarsen, coarser, coheirs, coiners, copiers, corneas, corners, cornier, corsair, crasher, crispen, crisper, cronies, crosier, eparchs, harpers, harpies, heparin, hernias, heroics, heroins, hoarier, hoarser, hornier, horsier, hospice, icespar, inchers, inreach, inscape, inshore, iphones, ironers, isopach, orphans, parches, persona, phonics, phonier, phonies, phraser, phrenic, pincers, pincher, pinches, poacher, poaches, porches, porcine, praiser, prancer, prances, pricers, princes, prosaic, rancher, ranches, rancors, raspier, rechain, recoins, repairs, roaches, rosehip, scarier, scoriae, scorner, scraper, sharpen, sharper, sharpie, soapier, spacier, sphenic, spheric, spinach