The term used to denote the capital of a not-for-profit making organization is

The term used to denote the capital of a not-for-profit making organization is "accumulated fund". Accumulated fund represents the surplus amount generated from the not-for-profit organization's activities, such as donations, grants, and profits from their operations. This fund is used to finance the organization's future projects, investments, and other initiatives that align with their mission and goals. It is similar to the retained earnings of a for-profit organization, as it reflects the organization's financial stability and its ability to sustain its activities in the long run.