The word proprietorship is playable in Words With Friends™, but 1 blank substituting for the letter 'p' is 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: 21
Highest Scoring Words With Friends™ Plays In The Letters proprietorship
:
Seven Letter Word Alert: (55 words)
hippest, hippies, hoppers, horrors, horsier, isotope, opposer, pithier, pitiers, poopers, poorest, poppers, poppies, porters, pothers, potpies, presort, prophet, propose, prosper, reports, reroots, reshoot, rhetors, rioters, rippers, ripstop, roister, rooster, rooters, ropiest, rosehip, shipper, shooter, shopper, shorter, soother, sootier, soppier, sorrier, stirrer, stooper, stopper, striper, strophe, terroir, terrors, tippers, tippier, tipsier, toppers, toprope, torpors, tripper, trooper