The word gingerroots 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: 16
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (40 words)
erosion, gingers, girners, goiters, goitres, gooiest, goosier, goosing, gorgons, goriest, grister, ignores, ironers, norites, orients, orogens, regions, reroots, resting, riggers, ringers, rioters, roister, rooster, rooters, rooting, serging, snogger, snorter, soggier, sootier, sooting, sorting, stinger, stonier, storing, toonies, torsion, trigger, triones