Compact bone, also known as cortical bone, is a dense and hard type of bone tissue that provides strength and support to the skeletal system. There are several synonyms that can be used to refer to compact bone, including solid bone, hard bone, and dense bone. Other terms that may be used in scientific or medical contexts include cortical bone, lamellar bone, and osteon-bearing bone. While the term compact bone is widely recognized and commonly used, these synonyms can be useful in providing a more specific description of the type of bone tissue being referred to.