What is another word for hot-air balloon?
Pronunciation: [hˈɒtˈe͡ə bəlˈuːn] (IPA) 
Hot-air balloons are a popular mode of transportation that is usually used for leisure activities or sightseeing purposes. A hot-air balloon is a large, colored bag that is filled with hot air to make it rise into the sky. There are various synonyms for the word hot-air balloon, including aerostat, balloon, blimp, dirigible, gasbag, and zeppelin. These words can be used interchangeably to refer to the same type of flying machines. Aerostat is a generic term that is used for all types of flying projectiles that are lighter than air. Blimp and dirigible, on the other hand, have a more specific meaning as they refer to airships that are powered by engines. Gasbag is a humorous term that is used to describe a talkative person, while a zeppelin is a type of airship that is usually used for military purposes.
