I just asked a question which was partly about the list of figures. I typed listof into the tag-input and both listoffigures and listoftables appeared as suggestions. I selected both of them. However, after I posted the question the tags were gone and the unrelated tag table-of-contents had emerged out of thin air.
Is this intended behavior?
It seems like both of these tags are synonyms of table-of-contents which makes little sense on its own IMHO but nevertheless I don't understand why synonymized tags would be suggested at all.
The reason why the synonyms are suggested during tagging is because initial tags stem from a personal association; you (or whomever writes the question) would not necessarily know about these synonym associations, and would therefore not think that the question should be tagged table-of-contents rather than listoffigures or listoftables. Providing these suggestions is a way of covering a larger selection of tags that the poster may associate with the post.