A decathlon is a sport competition that includes ten different track and field events. However, there are many synonyms that can be used to describe this type of competition. Some of the most common synonyms for decathlon are Heptathlon, Octathlon, and Pentathlon. These competitions typically have seven, eight, and five events, respectively, instead of the ten events in a decathlon. Another synonym that can be used for decathlon is multisport event, as it involves multiple sports or events. Additionally, some people may refer to a decathlon as an all-around event, or a comprehensive sports competition. Regardless of the name used, a decathlon remains a highly challenging and competitive athletic event.