Ninetyfold is a term that can be replaced with several other words, depending on the context in which it is used. In some instances, it may be substituted with "multiplying by ninety," "increasing ninety times," or "increasing nine thousand percent." Other synonyms for ninetyfold may include "exponential growth," "dramatic increase," or "explosive growth." The word may also be substituted with "enormous expansion" or "immense growth." Regardless of the synonym used, the main idea behind ninetyfold is that there has been a significant increase or growth in a particular area, indicating a significant improvement or change that should be acknowledged and appreciated.