The word gunslingers 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: 19
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (41 words)
ensigns, ensuing, gingers, ginseng, girnels, glueing, gunless, gunners, gurgles, gurning, ingress, insures, lensing, lingers, luggers, lunging, niggler, nursing, resigns, reusing, rulings, runnels, seguing, sensing, serging, signers, singers, singles, sinners, slinger, slugger, sniggle, snugger, snuggle, sunnier, sunnies, sunrise, surging, unrisen, unsling, urgings