Merge the “vocabulary-building” tag with the “vocabulary” tag

Question

There are three questions tagged with vocabulary-building. The tag should be deleted, and the questions tagged with vocabulary.

Answer 1

I'm not sure I know what either of those mean.

Likewise for words .

There are hardly any "vocabulary-building" ones, so I'd just delete those (or reduce to vocabulary.

We probably don't need both words and vocabulary, and possibly neither.