The word dissenters 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™ Play In The Letters
Seven Letter Word Alert: (34 words)
deniers, densest, deserts, desires, desists, dessert, destine, diester, dieters, dissent, dresses, entries, inserts, nesters, redness, reedits, renests, resends, resents, resides, resists, seitens, senders, sestine, sinters, sisters, snidest, sterned, strides, tenders, tinders, tressed, tresses, trienes