The antonyms for the word "nose-dived" could be, improved or elevated. When something improves, it goes up, while when it nose-dives, it goes down rapidly. In contrast, if a situation or object is elevated, it indicates an improvement in its condition or position. In addition, other antonyms for nose-dived include ascend, soar or rise. These words signify the opposite of the action of nose-diving, indicating that something is on the way up rather than a plummeting situation. These antonyms can be used to describe different situations where an improvement in the performance, business or economy is desired.