The word "Oppugner" means someone who opposes or attacks someone or something. Some antonyms for "Oppugner" are supporter, ally, defender, protector, assistant, friend, and collaborator. These antonyms denote someone who stands by another's side, aids in their cause or defends them from attack. A supporter is a person who advocates for someone or something. An ally is a person who shares a common goal or objective with someone. A defender is someone who protects another from harm or danger, while a protector shields others from the bad consequences of actions. An assistant helps someone in their tasks, while a friend is there to provide comfort and support during difficult times. Lastly, a collaborator is someone who works together with another to achieve a common goal.