Brachycephalous is a term used to describe people or animals with a short, broad head. Some synonyms for this word include broad-headed, round-headed, and short-headed. Another term that can be used is dolichocephalic, which is the opposite of brachycephalous and refers to people or animals with a long, narrow head. Some other synonyms for brachycephalous include pachycephalic, meaning thick-headed, and platycephalic, meaning flat-headed. These terms can be used in various fields such as anthropology, medicine, and zoology to describe physical characteristics and distinctions between different species or individuals.