profession

ChatGPT’s explanation of “professional”: Professional refers to specialized knowledge, skills and experience in a specific field or industry. Majors usually involve specific educational background and training, and have a certain degree of authority and recognition in the field.
For example:

Doctor is a medical profession that requires professional medical education and internship.
Engineers in the engineering profession need to have relevant technical knowledge and practical experience.

The origins of profession can be traced to the Latin word "professio," meaning a public declaration or commitment, and over time the word evolved to refer to a specific occupation or field.

ChatGPT definition