The antonyms for the phrase "growing less" are "increasing," "growing more," "expanding," or "escalating." When something is growing less, it is decreasing in size, amount, or intensity. On the other hand, when something is increasing, it is growing in size, amount or intensity. Expanding refers to getting wider or more significant, while escalating means growing more severe or intense. Using antonyms for "growing less" is essential in writing or conversation, as it helps convey the exact message, especially when trying to communicate change, whether negative or positive.