Repairing the car by himself gave him a real 'sense of achievement'. [=a proud feeling of having done something difficult and worthwhile]
The students were awarded (with) certificates of 'achievement'. [=documents saying that they reached an academic goal]
Tests measure students' academic 'achievement'. [=measure how much the students have learned]
(..) - Moral fiber? Blimey. Even when you go wrong, it turns out right. - Yeah, well done, Moral Fiber. - Congratulations, Potter. - A fine achievement. - Thank you. Well done, boy. - See you at Hagrid's, Harry. - I'm sorry we haven't spoken. After all, your story is one (..)2005 Harry Potter and the Goblet of Fire