The word recursions 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: 15
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (36 words)
censors, cession, coiners, corners, cornier, cosines, courier, courser, courses, cousins, cronies, crosier, crosser, cruiser, cruises, curries, cursers, cursors, insurer, insures, ironers, nursers, recoins, recross, reincur, rinsers, scorers, scorner, scourer, seniors, serious, snorers, sources, sucrose, sunrise, uncross