Antonyms for disapprovers include approvers, endorsers, supporters, advocates, admirers, enthusiasts, champions, and fans. An approver is a person who expresses agreement or satisfaction with something, whereas an endorser gives a formal or public statement of approval. A supporter is someone who backs or defends a person, idea, or cause. An advocate is a person who supports or pleads for a particular cause or policy. An admirer is someone who respects and admires someone or something. An enthusiast is an ardent and excited supporter of a cause or activity. A champion is a person who vigorously defends or supports a particular cause. Finally, a fan is someone who has a strong liking or admiration for something or someone.