The word gallivanted 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: 21
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (37 words)
agatine, aligned, anviled, availed, aviated, avigate, dealign, dealing, deaving, delving, deviant, elating, evading, gallant, gallate, gelatin, genital, glinted, ladling, lavaged, leading, leaving, ligated, tagline, tallied, tangled, telling, tillage, tingled, vaginal, valiant, vanilla, vantage, vedanta, vialled, village, vintage