A critical component of Cost-Benefit Analysis is understanding 'Opportunity Cost,' which represents the potential benefits lost when one option is chosen over another. This concept is vital in accurately assessing the true cost of a decision.

'Marginal Cost' also plays a significant role in CBA, referring to the cost of producing one additional unit of a good or service. It helps in understanding the incremental costs involved in scaling up a project or decision.

'Economic Feasibility' is another term closely related to CBA. It evaluates whether a project is economically viable, considering all costs and benefits. This ensures that resources are allocated efficiently.

'Return on Investment (ROI)' is a key metric in CBA that measures the profitability of an investment. It helps in comparing the efficiency of different investments by calculating the return relative to the investment's cost.

'Break-Even Analysis' determines the point at which total costs and total benefits are equal, meaning there is no net loss or gain. This analysis is crucial for understanding the minimum performance required to avoid losses.

'Net Present Value (NPV)' is a sophisticated metric used in CBA to assess the value of future cash flows in today's terms. It helps in understanding the long-term profitability of a project by discounting future benefits and costs to their present value.

'Total Cost of Ownership (TCO)' is another important concept, which includes not just the initial costs but also the ongoing operational costs over the lifecycle of a project. This provides a holistic view of the project's financial implications.

Overall, these related jargons enrich the understanding and application of Cost-Benefit Analysis by providing various lenses through which to evaluate the economic implications of decisions.