There are
- 135 questions tagged home
- 52 questions tagged home-directory
The excerpts for both are nearly the same, implying the same use:
home:
Questions about users' home folders or the actual /home directory are appropriate.
The home directory is the directory in which all the user's files reside. The Documents folder, Pictures, and settings reside in this directory, under /home/username on the filesystem.
I don't see why we need two tags for the same, please consider making home a synonym of home-directory and merge the 2 tags