Final answer:
Another term for a fibrous joint is synarthrosis, which represents a type of immobile joint that strongly unites adjacent bones.
Step-by-step explanation:
The term for a fibrous joint is synarthrosis. These joints are essentially immobile and provide a strong connection between the adjacent bones. The three types of fibrous joints are sutures, found in the skull, gomphoses, which anchor teeth in the jaw, and syndesmoses, between long bones like the radius and ulna or tibia and fibula. Functionally, fibrous joints serve to protect internal organs, provide strength to regions of the body or offer weight-bearing stability.