Gili is a word that originated in Bali, Indonesia and is commonly used to describe small islands. However, there are other words that can be used as synonyms for gili such as cay, islet, key, and atoll. A cay is a small, low island that is made of coral or sand and is usually located in the Caribbean Sea. An islet is a small island that is surrounded by water and is smaller than an island. A key is a small, low island that is found in the Gulf of Mexico. Finally, an atoll is a ring-shaped coral reef that surrounds a lagoon. These synonyms for gili all have their own unique characteristics and can be used interchangeably depending on the context.