The word defrosting 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: 17
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (50 words)
defrost, editors, eroding, fidgets, finders, fingers, firedog, foisted, foister, fondest, foreign, forgets, forints, forties, fridges, friends, fringed, fringes, fronted, frosted, godsent, goiters, goitres, goriest, groined, ignored, ignores, indorse, negroid, norites, orients, redoing, refinds, regions, resting, rodents, roisted, rosined, snifter, snorted, sortied, sorting, steroid, stinger, stonier, storied, storing, tierods, tinders, triones