There are several synonyms for the word "knee-joint" which include genu, articulatio genus, and tibiofemoral joint. The term "genu" is derived from the Latin word "genuflexus" meaning "bending of the knee." It is commonly used in medical texts to describe the knee joint. The term "articulatio genus" is a Latin term that can also be used to describe the knee joint. Another synonym for the knee joint is the "tibiofemoral joint," which refers to the junction point between the thigh bone (femur) and the shin bone (tibia). These synonyms all refer to the same joint that is crucial for movement and mobility in the lower body.