The antonyms for criticizer can be considered as people who appreciate others, recognize their efforts, and offer constructive feedback. The first antonym is "admirer," which refers to a person who admires and respects the work of others. Another antonym is "supporter," which means someone who supports and encourages the work of others. A "cheerleader" is also an antonym for criticizer, as they tend to cheer and motivate people instead of finding faults in their work. Lastly, "complimenter" is an antonym for criticizer, as they offer genuine compliments on the work of others. These antonyms show that there are numerous ways to express our thoughts and opinions about others' work, and it's not always necessary to criticize or find faults in their efforts.