Inverclyde is a specific name of a region and district in Scotland, so there are no synonyms for this word. However, there are other ways you can talk about this area without using the proper noun. You can refer to it as the western part of Scotland, the region around the Firth of Clyde, or the district including Greenock, Gourock, and Port Glasgow. Additionally, if you want to be more general and include nearby areas, you can talk about the Scottish West Coast or the Highlands and Islands. While there may not be exact synonyms for Inverclyde, there are plenty of ways to describe and reference the area in which it is located.