The word depository 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: 16
Highest Scoring Words With Friends™ Plays In The Letters depository
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Seven Letter Word Alert: (41 words)
deports, deposit, destroy, diopter, dioptre, disroot, dopiest, editors, isotope, isotype, optrode, osteoid, peridot, periods, poorest, posited, prosody, pyrites, roisted, roosted, ropiest, sootier, sortied, spidery, spirted, spoored, sported, steroid, stooped, stooper, storied, striped, stripey, tierods, topside, toroids, torpedo, torpids, tripeds, tripods, trooped