One who opposes or is hostile to an idea or cause:
A militant person
A substance in the body, or a drug, that counteracts or blocks the effect of another substance or drug (called the agonist)
Find another word for hater. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for hater, like: enemy, despiser, execrator, ill-wisher, racist, abominator, calumniator, militant, antagonist, advocate of race hatred and jingoist.