A maillot de bain is a French term that refers to a one-piece swimsuit. However, there are several synonyms for this term that are commonly used in different parts of the world. Some of the popular synonyms for maillot de bain include bathing suit, swimming costume, swimsuit, swimwear, and one-piece. In the United Kingdom, the term "cossie" is frequently used to refer to a one-piece swimsuit, while in Australia, the term "togs" is popular. Other synonyms for maillot de bain include leotard bathing suit, bodysuit, monokini, and tank suit. Regardless of the term used, a maillot de bain remains an essential item of clothing for summertime activities.