Synonyms for tube

noun

• a hollow cylindrical shape
• (anatomy) any hollow cylindrical body structure
• an electric railway operating below the surface of the ground (usually in a city)
• conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
• electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope

verb

• convey in a tube
• place or enclose in a tube
• provide with a tube or insert a tube into
• ride or float on an inflated tube