Stoppling refers to the act of plugging or blocking a hole or opening. There are various synonyms that can be used in place of the word stoppling, such as plugging, sealing, filling, blocking, capping, corking, and stopping up. Each of these words conveys the same meaning as stoppling and can be used interchangeably depending on the context of application. For example, while the word corking is commonly used in the wine industry, plugging would be commonly used in a plumbing context. Overall, using synonyms helps to add variety to one's vocabulary and makes communication more effective.