Abhorrer n. : One who abhors.

Example:


Taxonomy
abhorrer, past participle, tenses, Wiktionary, Pronunciation, compound, John Bowring, Conjugation, Thinking English Grammar, abhor, killing, Guy, Tops, honour, Xavier, Dekeyser, p59, Thomas de Quincey.

Defination from the web:
abhorrer of war, the art of maiming and killing became ever more efficient. ... Whether "Petitioner" or "Abhorrer", his opinion was asked and use of his undistinguished name was requested...