The word tailgaters 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: 13
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (45 words)
aerials, agatise, agitate, aiglets, aigrets, artiest, atresia, attires, eartags, gaiters, gestalt, glister, glitter, gristle, iratest, laagers, largest, lariats, latites, ligates, litters, rattail, rattles, realist, regalia, regatta, retails, retilts, saltate, saltier, satiate, slatier, slitter, stagier, starlet, starlit, startle, stilter, striate, targets, tastier, teargas, tertial, tilters, triages