The word demonetising 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™ Play In The Letters
Seven Letter Word Alert: (83 words)
deeming, deities, dements, demoing, demotes, denoise, denotes, dentine, denting, dentins, destine, dieties, dietine, dieting, dingies, dinting, diosmin, edgiest, editing, edition, egotism, eminent, emoting, endings, endmost, endnote, endogen, engined, engines, genomes, gnomist, godsent, ignited, ignites, indents, indigos, indites, inosine, inosite, intends, intense, intoned, intones, iodines, iodites, ionised, itemise, meeting, mendigo, mending, mention, midgets, minding, mindset, minions, minting, misdone, misedit, misting, mitogen, moisten, needing, nesting, nominee, nondiet, onetime, seeding, seeming, segment, sending, sigmoid, smidgen, smidgin, smiting, stimied, stoning, teeming, tending, tendons, tensing, tension, tidings, timings