Growingly is an adverb used to describe a progressive change or increase in something. Synonyms that can replace the word growingly include progressively, increasingly, gradually, steadily, and continuously. These words suggest a gradual or continuous change that is happening over time. Other synonyms include persistently, unceasingly, and uninterruptedly, which refer to a constant or uninterrupted progression. If you want to convey a sense of speed in change, some other synonyms to use would be swiftly, rapidly, quickly, or immediately. Whatever word you use, make sure it fits the context of the sentence and accurately conveys the intended meaning.