Acaroid resins are commonly known as fossil resins, which are a group of organic materials formed from the hydrocarbons of ancient trees. These resins are commonly used in the production of varnishes, adhesives, and coatings. However, there are several synonyms for acaroid resins such as amber, copal, gum copal, kauri gum, fossilized resin, and some kinds of frankincense. These resins have similar properties and can be used interchangeably in many industries and applications. Additionally, they have been used in traditional medicine to treat a variety of ailments due to their antibacterial, anti-inflammatory, and pain-relieving properties.