A perfectibilist is a person who believes in the idea of achieving perfection through continuous self-improvement and learning. Some synonyms for perfectibilist could be a self-improvement enthusiast, self-perfectionist, or a self-growth devotee. Other synonyms could be a self-refinement pursuer, self-development advocate, or self-enhancement proponent. Overall, these synonyms all reflect an individual who is striving for self-improvement and personal growth. Being a perfectibilist means continually pushing oneself to improve, whether it be in mindset, skills, or character. These synonyms ultimately describe the same ambition and drive towards betterment that a perfectibilist embodies.