The word prehensions 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™ Play In The Letters prehensions
:
Seven Letter Word Alert: (44 words)
heiress, heroine, heroins, heroise, hipness, hosiers, inshore, iphones, nephron, oneness, openers, penises, penners, pennies, pension, peonies, persons, phonier, phonies, pinenes, pioneer, poesies, prisons, rehones, reopens, repines, reposes, reshine, reships, reshoes, respins, rosehip, seniors, shiners, shrines, sinners, siphons, snipers, soirees, sphenes, spheres, spinner, spinons, spinose