Should the tags table-of-contents, list-of-figures and list-of-tables be merged? After all, their implementations are pretty similar and questions and solutions applying to one of them typically apply to the others as well.
I think that would be ok. Even somebody browsing old list-of-figures questions could benefit from the other questions and answers regarding the table of contents.
Though being able to distinguish different concepts is important, TOC, LOF and LOT aren't really different.
I think this might be confusing for casual users of the site. That the implementation is similar is less visible than the difference in semantics.
I don't really see who would benefit from this synonym. People with a special expertise in these macros looking for questions to answer? People wanting to earn tag badges?