Use core to refer to the central, most essential part or aspect of an object or concept. It emphasizes the significance or foundational nature of whatever is being discussed. In a physical context, core might relate to the inner structure of a fruit or the human body, whereas, in abstract terms, it can pertain to the main values or goals driving an individual or organization.

The word corps is most commonly used in military and organizational contexts to denote a sizable formation of troops or a group undertaking a specific task. In military use, a corps is typically a large tactical unit or combat formation. The term can also be found in certain civilian organizations such as the Peace Corps or the press corps, indicating a distinct group dedicated to a certain mission or field of work.

While core refers to the center or foundational aspect of an entity or principle, corps describes a group oriented toward a shared mission, commonly in a military or official capacity. Despite their similar pronunciations, their contexts are vastly different, with core being used more broadly across various spheres, and corps remaining specific to organized collective entities. Remembering these distinct applications will ensure clear and accurate communication.