The word depreciator 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: 18
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (73 words)
adepter, adopter, airdrop, airport, apricot, capered, carotid, carport, carried, catered, caterer, cordate, coterie, created, creator, decrier, diopter, dioptre, eardrop, ectopia, epidote, erector, erotica, erratic, etaerio, operate, opiated, parotid, peatier, peridot, picrate, pierced, piercer, pirated, praetor, precoat, precode, predate, predict, preedit, prerace, proceed, prorate, rapider, reacted, reactor, readier, readopt, receipt, recited, reciter, recrate, redrape, redtape, repaced, reprice, reraped, retaped, retired, retrace, retrade, retread, retried, ripcord, tapered, taperer, tardier, tarried, tearier, tepider, terrace, tireder, treader