Ex-positions can be defined as past exhibitions or expos that have already taken place. There are several synonyms that could be used to describe ex-positions, such as expositions, exhibitions, displays, shows, and presentations. These terms all refer to a public display of art, products, or ideas that are available for viewing by the public. Some other synonyms that could be used to describe ex-positions include demonstrations, showcases, fairs, and conventions. These words all capture the idea of a public display, and can be used interchangeably with ex-positions to describe a past event where something was on display for the public to see and experience.