The word covercle is not a commonly used term, and there are not many synonyms that match its exact meaning. However, some related words can be used in its place depending on the context. For instance, the word lid is often used interchangeably with covercle since it is a term used for covering containers. Similarly, the words cap, top, and stopper can also be used instead of the word covercle. These words are all applicable if someone is discussing a cover for a jar or bottle. In essence, when replacing the word covercle with synonyms, it is best to consider the specific object to which it refers.