Air charter refers to the rental of an entire aircraft for a specific trip or duration. There are several synonyms for this term that can be used interchangeably depending on the context. One synonym for air charter is air taxi, which refers to the use of smaller aircraft for short trips such as regional flights. Another synonym is private aviation, which encompasses all types of non-commercial air travel, including air charter. Jet charter is another synonym that specifically refers to the rental of private jets for business or leisure travel. Finally, air leasing is another synonym that is commonly used to describe long-term rental arrangements for aircraft.