Nosediving is a term used to describe a sudden and steep decline or fall. Antonyms or opposite words for nosediving could include soaring, ascending, increasing, thriving, flourishing, prospering or progressing. All of these terms indicate an upward trend or growth, in contrast to the downward trajectory represented by nosediving. Soaring, for example, suggests rapid and graceful upward movement, while ascending evokes the image of climbing higher and higher. Similarly, prospering and flourishing suggest success and prosperity, while thriving indicates a continued state of growth and development. These antonyms provide a positive contrast to the negative connotations of nosediving, expressing optimism and hopefulness instead.