The word "mystery" refers to something that is unclear or unknown, or something that is puzzling and requires investigation. Synonyms of mystery include enigma, puzzle, conundrum, riddle, secret, intrigue, and cryptic. Enigma emphasizes the difficulty of understanding something or someone, while puzzle suggests something that needs to be solved. Conundrum denotes a confusing or tricky problem, while riddle is a type of puzzle that challenges the mind. Secret and intrigue indicate the presence of hidden information or motives. Cryptic emphasizes the mysterious and obscure, often involving codes or symbols that need to be deciphered. These synonyms allow for the exploration of various types of mysteries and the challenges they present.