Human accelerated regions (HARs) are stretches of DNA sequences that have undergone accelerated evolution in humans compared to other species. These regions have been identified as potential drivers of human-specific traits and diseases. Some synonyms for HARs include human-specific accelerated regions, rapidly evolving regions in humans, and highly differentiated regions in humans. Other related terms include positively selected regions, which are DNA sequences that have undergone selection for advantageous traits, and non-coding regions, which refer to areas of the genome not involved in protein-coding. Understanding these regions and their functions could potentially shed light on human evolution and the genetics behind human-specific qualities like brain development and language acquisition.