The word desertions 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: 12
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (59 words)
deniers, denoise, denotes, densest, deserts, desires, dessert, destine, diester, dieters, dissent, dossier, editors, endorse, entries, erotise, estrone, indorse, inserts, nesters, norites, nosiest, orients, redness, reedits, renests, resends, resents, resides, rodents, roisted, rosiest, rosined, seitens, senders, seniors, sestine, sinters, snidest, snorted, soirees, sortied, sorties, stenose, stereos, sterned, steroid, stoners, stonier, storied, stories, strides, tenders, tensors, tierods, tinders, tressed, trienes, triones