The word depositors 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: 14
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (54 words)
deports, deposit, despots, diopter, dioptre, dispose, disroot, dopiest, dossier, editors, isopods, isotope, optrode, osteoid, peridot, periods, persist, poorest, poroses, porosis, posited, posters, priests, reposts, respots, roisted, roosted, ropiest, rosiest, sootier, sortied, sorties, spiders, spirted, spoored, sported, spriest, sprites, steroid, stooped, stooper, storied, stories, strides, striped, stripes, tierods, topside, toroids, torpedo, torpids, tripeds, tripods, trooped