Professional and Past master

Professional

Professional noun - A person engaged in one of the learned professions.

Past master is a synonym for professional in expert topic. In some cases you can use "Past master" instead a noun "Professional", when it comes to topics like ability.

Past master

Past master noun - A person with a high level of knowledge or skill in a field.
Usage example: a movie director who was widely regarded as the past master of suspense

Professional is a synonym for past master in ability topic. You can use "Professional" instead a noun phrase "Past master", if it concerns topics such as expert.
Cite this Source
Past master and Professional. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/professional/past_master
Professional & Past master. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/professional/past_master>.
Past master or Professional. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/professional/past_master.
Google Ngram Viewer shows how "professional" and "past master" have occurred on timeline