The phrase "erode dramatically" can be replaced with several synonyms to effectively convey the message of rapid and significant erosion. "Deteriorate rapidly" demonstrates the idea of a sudden decline or decay. "Degenerate precipitously" also conveys the notion of a swift and severe deterioration. Similarly, "crumble abruptly" emphasizes the sudden nature of the erosion. "Dissolve swiftly" demonstrates the concept of a quick and thorough breakdown. Lastly, "wear away drastically" accentuates the significant reduction of the material or substance due to erosion. These synonyms can be used interchangeably depending on the context and the desired effect of the message.