The phrase "single-seater" commonly refers to a type of vehicle or aircraft that can accommodate only one person. However, there are several synonyms that can be used interchangeably with this term. For instance, the phrase "one-seater" can be used to describe a vehicle or aircraft that can only seat one person. The term "monoposto" is commonly used in Italian to refer to a single-seater racing car, while "solo" is a term that can be used to describe a single-seat airplane. Other synonyms for "single-seater" include "solo vehicle," "one-man machine," and "individual unit." Regardless of the term used, all these words communicate the idea of a vehicle or aircraft designed for one occupant.