The word gingersnap 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: (29 words)
earning, engrasp, erasing, gainers, gaspier, gasping, gearing, gingers, ginseng, insaner, naggers, nearing, parging, parings, parsing, pingers, ranging, rasping, reaping, regains, saggier, searing, serging, signage, snagger, snaring, spanner, sparing, spinner