The word fairgrounds 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™ Play In The Letters
Seven Letter Word Alert: (24 words)
adoring, aground, airguns, ardours, difuran, donairs, dousing, dragons, durians, fungoid, furring, grounds, gurnard, infusor, inroads, insofar, ordains, rigours, roaring, rousing, signora, soaring, souring, surfing