The word horseshoeing 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™ Plays In The Letters horseshoeing
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Seven Letter Word Alert: (43 words)
engross, erosion, genesis, goosier, goosies, goosish, greisen, heiress, heroine, heroins, heroise, honoree, horsing, hosiers, ignores, ingress, inshore, isogons, negroes, noosers, ogreish, onshore, orogens, regions, rehinge, rehones, reshine, reshoes, resigns, seniors, shiners, shoeing, shooing, shoring, shrines, sighers, signees, signers, signors, singers, soirees, sooners, sorghos