pier

a long structure sticking out from the land over the sea, where people can walk or large boats can be tied, sometimes with restaurants and places of entertainment on it

a low structure built at the edge of water, used especially for getting into and out of boats

a strong thick column used to support a wall, roof, or other structure

a structure built out over the water on posts, along which boats can land:

Examples:

a thick, strong column used to support a structure such as a bridge