Hyperostosis is a medical condition that refers to an excessive growth of bone tissue in a particular area. This condition can cause various complications, including bone fractures, reduced mobility, and deformities. There are several synonyms for hyperostosis, including osteosclerosis, osteopetrosis, and fibrous dysplasia. Osteosclerosis refers to the hardening of bone tissue, while osteopetrosis refers to a rare genetic mutation that increases bone density. Fibrous dysplasia is a non-cancerous growth of fibrous tissue in bones, which can cause bone deformities and fractures. All of these conditions are different, but they share a common feature of excessive bone growth leading to various complications.