Asperser is a noun used to refer to a person who criticizes or maligns others unjustly. Some of the antonyms for the word asperser include admirer, supporter, and advocate. Admirer is a person who has a high regard or respect for someone or something. A supporter is someone who promotes, assists or approves of someone or something. An advocate is someone who publicly supports and defends a particular cause, idea or person. Other words that are antonyms of asperser include praise, compliment, applause, and esteem, among others. These antonyms act as an opposite to asperser, defining someone who does not criticize or judge unfairly.