The word professorship 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: 24
Highest Scoring Words With Friends™ Plays In The Letters professorship
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Seven Letter Word Alert: (33 words)
fishers, foppish, hissers, hoofers, hoppers, horsier, hosiers, opposer, opposes, oppress, poofers, poofier, poopers, poroses, porosis, profess, proofer, propose, prosper, reproof, reroofs, reships, resorps, rippers, roofers, rosehip, sherifs, shipper, shopper, sippers, soppers, soppier, spoofer