The word garnisheed 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: (62 words)
adheres, angered, aniseed, arsheen, arshine, dangers, dashing, dearies, deniers, deraign, derange, dishrag, endears, enraged, enrages, erasing, gainers, ganders, gardens, garnish, genders, gnashed, gnasher, grained, greased, greisen, grenade, hagride, hagseed, handers, handier, hangers, hardens, headers, headier, heading, hearing, hearsed, hedgers, heeding, herding, hernias, hinders, neighed, readies, reading, regains, rehangs, rehides, rehinge, reigned, reshine, sandier, sardine, searing, sedgier, seeding, shadier, shading, sharing, sheared, shrined