abhorrer
n. C2 Proficiency ab·hor·rer
n. someone who strongly dislikes or hates something very much. This is an old-fashioned word that you will mostly see in books or historical texts.
n. a person who experiences intense hatred or aversion toward something. Archaic in modern usage; typically found in literary or historical contexts.
He was a true abhorrer of all forms of violence.
The old man was a noted abhorrer of change, preferring the quiet of his village to the noise of the city.
In the historical novel, the protagonist is portrayed as a staunch abhorrer of the monarchy, dedicating his life to the cause of republicanism.
From abhor + -er.