The word demythologise 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: 24
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (72 words)
delight, delimes, demotes, deslime, diethyl, distyle, doltish, doomily, edgiest, egotism, elegist, elegits, elogies, elogist, eomyids, ethmoid, eyelids, eyeshot, eyeslit, geodesy, geodome, ghosted, ghostly, goodies, goodish, gooiest, gothism, heisted, helmets, hogtied, hogties, hoisted, holiest, homiest, hostile, hotdogs, isohyet, lighted, medleys, methods, methyls, midgets, mildest, mistold, modesty, moistly, moodily, moseyed, motleys, myeloid, oilseed, oldtime, omelets, oolites, ooliths, osteoid, seedily, semilog, sighted, sightly, sleight, smelted, smoothy, soothed, soothly, sootily, stooged, stooled, stoolie, styloid, stymied, toehold