The term 'key chain' refers to a small chain, usually made of metal, with a small item attached to it, such as a key or a decorative charm. The crossword solutions for this term are 'ISLETS' (6 letters), 'ARCHIPELAGO' (11 letters), and 'ISLES' (5 letters). An islet is a very small island, usually found in a lake or river. An ARCHIPELAGO is a group of islands, usually located in a large body of water such as an ocean. ISLES is another word for islands, which are land masses surrounded by water.