antagonizer Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a person who opposes or creates conflict. Example Sentence He is always causing problems as an antagonizer. More Example Sentences The antagonizer tried to create a fight. Synonyms opponent; adversary; challenger Antonyms friend; ally; supporter Hear It! Say It! Write It! antagonizer Switch to cursive Start Share with your friends: