Viviparity is a term used to describe the process in which animals give birth to live offspring, rather than laying eggs. While this term is widely used in biology, there are several synonyms that can be used to describe the same process. These include words like placental birth, live birth, and parturition. Other terms that can be used to describe viviparity include gestation, pregnancy, and embryonic development. Each of these synonyms provides a slightly different emphasis on the specific biological processes involved in the process of producing and giving birth to live offspring, highlighting the complexity and diversity of animal reproduction.