The word demeaningly 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: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (46 words)
adenine, aligned, amylene, annelid, damning, dealign, dealing, deeming, deleing, denying, dienyne, dyeline, emailed, emendal, enamine, endgame, engined, geminal, gleamed, gleaned, gmelina, inanely, landing, leading, leaning, lending, limeade, lineage, lineman, linemen, mangily, mangled, meaning, melange, melanin, melding, mending, mileage, mingled, myeline, needily, needing, yealing, yealmed, yeaning, yelming