An overachiever is someone who goes above and beyond expectations, often surpassing the goals and targets set for them. There are many synonyms for this term, including high achiever, over-performer, superstar, go-getter, top performer, high-flyer, and high scorer. These terms all describe individuals who consistently exceed what is expected of them, often pushing themselves to the limit and striving for excellence in all that they do. While being an overachiever can lead to great success and personal fulfillment, it is important to strike a balance between ambition and well-being to avoid burnout.