A cylinder is a three-dimensional shape with two parallel bases connected by a curved surface. The crossword solutions for the term cylinder include SPOOL (5 letters), BOBBIN (6 letters), BARREL (6 letters), ROLL (4 letters), ROLLER (6 letters), TUBE (4 letters), and PIPE (4 letters). A SPOOL is a cylindrical object used to store thread or wire. A BOBBIN is a small, cylindrical object used in sewing machines to hold thread. A BARREL is a large, cylindrical container used to store liquids or other materials. A ROLL is a cylindrical shape made up of paper, fabric, or other material. A ROLLER is a cylindrical object used to apply pressure or to move an object. A TUBE is a hollow cylinder used to transport liquids or gases. A PIPE is a hollow cylinder used to transport liquids or gases.