Argosy n. (pl. argosies) A large ship, esp. a merchant vessel of the largest size. "Where your argosies with portly sail... Do overpeer the petty traffickers."
... at its base and can be seen from afar, in which many generations shall find their peace and inspiration. While other books are like the humble craft which ply from place to place along the coast, this book is as a stately merchantman which compasses the great waters and returns with a golden argosy. ... — Books and Bookmen • Ian Maclaren