Hymenopterans are a group of insects that include bees, wasps, and ants. Although "Hymenopteran" is the scientific name for this group of insects, there are several other words that can be used as synonyms. For example, "apocritan" is often used to describe this group of insects, as it refers specifically to those hymenopterans that have a narrowing between their thorax and abdomen. "Aculeate" is another synonym for hymenopterans, and it describes those insects that have stingers, such as bees and wasps. "Stinging insects" is yet another term that can be used to refer to hymenopterans, as it accurately describes their aggressive defensive mechanism.