The meaning of these nouns are really similar, however, they are not the same. Intention means the aim that guides an action or an objective. It also means goals or aims. In legal context, it means the design with which a person refrains from doing an act. In medicine, it refers to a certain manner of healing, like healing fracture without granulation. Will, on the other hand, desire, purpose, determination, so it is kind of stronger than intention. It can also mean self-determination or self-discipline. As a verb, it means to decide or to exercise the will. In legal sense, will can also refer to the document in which a person specifies the method to be applied in the management of their estate after death.
