The word garnisheeing 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: 20
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (54 words)
airings, arising, arsheen, arshine, asinine, earning, engages, engines, enrages, ensnare, erasing, gainers, gaining, garnish, gashing, gearing, gingers, ginseng, girning, gnasher, greisen, hangers, hanging, hearing, hernias, hinging, hinnies, ingrain, insaner, naggers, nearing, raining, raising, ranging, regains, rehangs, rehinge, reining, reshine, ringing, rinsing, saggier, searing, serging, sharing, shinier, shining, sieging, sighing, signage, signing, singing, snagger, snaring