Difference between Balloon and Billow

Balloon

Part of speech: verb

Definition: To increase or expand rapidly.

Part of speech: noun

Definition: An inflatable buoyant object, often (but not necessarily) round and flexible. Such an object as a child's toy. Such an object designed to transport people through the air. A sac inserted into part of the body for therapeutic reasons; such as angioplasty. A speech bubble.

Example sentence: If you're embarking around the world in a hot-air balloon, don't forget the toilet paper.

Billow

Part of speech: verb

Definition: To surge or roll in billowsTo swell out or bulge

Part of speech: noun

Definition: A large wave, swell, surge, or undulating mass of water, smoke or sound