The word proctologists 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: 22
Highest Scoring Words With Friends™ Play In The Letters proctologists
:
Seven Letter Word Alert: (23 words)
colossi, copilot, glottis, grottos, pistols, porosis, porotic, portico, postils, prologs, prootic, protist, risotto, scorpio, scripts, soloist, spigots, spotlit, topsoil, tosspot, tricots, tropics, tropist