Authority
Authority noun - A person with a high level of knowledge or skill in a field.
Usage example: the leading authority on neural anatomy
Specialist is a synonym for authority in expert topic. In some cases you can use "Specialist" instead a noun "Authority".
Specialist
Specialist noun - An expert who is devoted to one occupation or branch of learning.
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Synonyms for Specialist
Authority is a synonym for specialist in expert topic. You can use "Authority" instead a noun "Specialist", if it concerns topics such as person.
Mutual synonyms
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Specialist and Authority. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/authority/specialist
Authority & Specialist. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/authority/specialist>.
Specialist or Authority. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/authority/specialist.
Google Ngram Viewer shows how "authority" and "specialist" have occurred on timeline