Araneidan if often used to describe spiders, but there are several synonyms that can be used interchangeably. Arachnid is perhaps the most common synonym, as it refers to any member of the class Arachnida, which includes spiders, scorpions, and ticks. Other synonyms include spiders themselves, which can be broken down into several categories such as orb weavers, wolf spiders, and jumping spiders. Additionally, some people may use terms like web-spinners or eight-legged creatures to describe these arthropods. Despite their fearsome reputation, araneidans play important roles in many ecosystems as predators and have a fascinating biology and behavior.