Syngenic is a term that is used to describe cells, tissues or organs that have compatible genetic makeup, thereby making them suitable for transplantation. Some synonyms of the word syngenic include "allogeneic," "autologous," and "homologous." Allogeneic refers to materials that are genetically different but are still compatible enough for transplantation. Autologous refers to materials that come from the same individual, such as tissues or cells harvested from the patient's own body. Homologous refers to tissues or organs that are functionally and anatomically similar to each other, though they may come from different donors. Overall, these synonyms are essential for understanding the different aspects of transplantation and the compatibility of materials involved.