1) Boat 2) Harbor vessel 3) River tug 4) Tower 5) Tugboat 1) Tug 2) Tugboat 1) Plaything of a kind 2) Tug in the tub 
A towboat is a boat designed for pushing barges or car floats. Also referred to as `tugboats` towboats are characterized by a square bow with steel knees for pushing and powerful engines. They are most often seen on inland waterways and western rivers where they can push more than 50 large barges lashed together into a tow of varying shapes and .....
• (n.) A steamer used for towing other vessels; a tug. • (n.) A vessel constructed for being towed, as a canal boat.
A snub-nosed boat with push knees used for pushing barges. A small towboat (called a push boat) may push one or two barges around the harbor. A large towboat is used to push from 5 to 40 barges in a tow is called a line boat. From the Port of New Orleans, line boats deliver cargo to Mid-America via the 14,500-mile waterway system flowing through th...
Tow'boat` noun 1. A vessel constructed for being towed, as a canal boat. 2. A steamer used for towing other vessels; a tug.