Currently, a synergistic approach is often used in various fields of knowledge to study various phenomena and processes. The paper evaluates a synergy of various factors in exogenous processes in a particular territory. Exogenous phenomena are identified to encompass geological processes that occur on the earth, in its uppermost layers. They either simplify or complicate the underlying relief. Synergism in exogenous processes can consist in simultaneous occurrence of landslides, mudflows and floods in appropriate conditions. The studies, to a certain extent, indicated the synergy in the behavior of the above mentioned phenomena. The research hypothesis implies the adaptation of the synergistic approach to the study of exogenous processes.