The crossword solution for the term COUNTERPART OF FF is REW, which stands for Reverse Engineering Wizard. Reverse Engineering Wizard is a software program used to analyze and reverse engineer existing software programs. It is used to identify and document the structure and design of existing software programs, as well as to create new software programs based on the existing ones. Reverse Engineering Wizard is the counterpart of the software program Forward Engineering Wizard, which is used to create new software programs from scratch.