expounder
Noun
Meaning
One who expounds or explains; an interpreter.
Source: Webster's dictionarySynonyms
expositor
apostle
herald
paladin
interpreter
lecturer
exponent
friend
critic
champion
ally
advocate
protagonist
patron
warrior
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Antonyms
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Examples
Newtonian physics found its apostle in Kant; modern physics is still awaiting its modern expounder.
As a result, many people began calling him the Great Expounder of the Constitution.