Sailboat is to sail as kite is to fly, just as airplane is to wing and oil tanker is to engine.
its sails
The vertical pole on a sailboat is called the mast, but at the bottom of the sail is horizontal pole called a boom. On the Tall Ships, the horizontal pole AT THE TOP of the sail is called the yardarm.
The mast. The vertical spar the sail attaches to is the Mast. The horizontal spar is called a Boom.
Not all of the sails are white only sails made out if Dacron are white. But sails made out of carbon are black.