The word prophesiers 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: 19
Highest Scoring Words With Friends™ Play In The Letters prophesiers
:
Seven Letter Word Alert: (29 words)
heiress, heroise, hoppers, horsier, hosiers, oppress, poesies, presser, prosper, rehires, repipes, reposer, reposes, repress, reprise, reships, reshoes, reshore, resorps, respire, rippers, rosehip, shipper, shopper, sippers, soirees, soppers, soppier, spheres