The answer depends on what you mean by "stronger." If you are referring to tensile strength, which is the ability of a material to withstand pulling forces, then bone is generally considered the strongest tissue in the human body. Bone is a rigid and strong connective tissue that contains mineralized extracellular components. This mineralized matrix gives bone its strength and rigidity.
However, if you are referring to elasticity, which is the ability of a material to deform under stress and return to its original shape, then tendons are arguably stronger than bone. Tendons are tough, fibrous cords of connective tissue that attach muscles to bones. While they are not as strong as bone in terms of tensile strength, tendons are more elastic and can withstand more stretching and pulling without breaking.
Ultimately, the "strongest" tissue depends on the specific context and how "strength" is defined.