What word describes someone who is able and capable?

The term that best describes someone who is able and capable is "competent." This word indicates that an individual has the necessary skills, knowledge, and qualifications to successfully perform a specific task or job. Competence implies not just ability, but also a reasonable level of proficiency and the reliability to fulfill responsibilities effectively.

In this context, being competent is crucial in health science and other professions where the quality of service and adherence to standards can significantly impact outcomes. A competent individual demonstrates both confidence and capability, which assures others of their ability to manage tasks appropriately.

The other options do not convey the same specific meaning. "Compensatory" relates to providing a balance or offset, often in a financial context. "Complementary" describes something that completes or goes well with something else, rather than referring to an individual's skills or abilities. "Complete" means having all necessary parts or elements but does not specifically indicate competence or capability in a particular area. Hence, "competent" stands out as the term that accurately captures the essence of being able and capable.