I draw your attention to tags and tagging.
Not only is one simply the verb form of applying the other (and should thus be a synonym) they certainly seem to be meta tags; neither could be the only tag on a question.
Most, but not all, seem to be for Facebook (but let me also point out the problematic facebook-tagging and facebook-tags, which aren't synonyms either.)
And, let's not forget photo-tagging.
There's some clean needing doing here. And perhaps some burnination.
So, my suggested course of action:
- Synonymize facebook-tagging and facebook-tags (I think the latter should be the "master")
- Clean up uses of tags, tagging, and photo-tagging to be for the appropriate app