The Finite Difference Method (FDM) is a mathematical technique used for solving differential equations and partial differential equations. This method uses a discrete representation of the problem domain and reduces the differential equations to algebraic equations, which can be solved using iterative methods. There are several synonyms for the Finite Difference Method, including the Grid Method, the Numerical Method, and the Discretization Method. The Grid Method refers to the concept of representing the problem domain using a grid or mesh of discrete points. The Numerical Method takes into account the need for numerical evaluations of the equations involved. Discretization Method emphasizes the discretization step taken for solving the differential equations. These different synonyms for the Finite Difference Method emphasize various aspects of the method and help clarify its application in various fields.