Boat shoes are a classic and versatile footwear choice, but they can also be called by other names. One synonym for boat shoe is deck shoe, which refers to its original use on boats. Another synonym is topsider, which was coined by the popular brand Sperry Top-Sider. Loafer is also a common term for boat shoes, especially when the shoes have a more casual or dressy look. Moccasin is another synonym, as boat shoes often have a moccasin construction with a stitched upper and rubber sole. No matter what you call them, these shoes are a timeless addition to any wardrobe.