The antonyms for the word "nose-dives" are based on the idea of rising, ascending, or flying. Words like soar, ascend, rise, elevate, climb, and lift are all opposites of "nose-dives." These words suggest movement in an upward direction, indicating an increase in height or altitude. While "nose-dives" indicate a decrease in height and a plummet towards the ground, its antonyms suggest the opposite - an ascent towards the sky. When used in sentences, these antonyms can be used to describe positive situations or scenarios that are on the rise, such as an increase in productivity or progress towards a goal.