The ip tag seems to be a synonym of ip-address, though it could also stand for intellectual property.
address also is a synonym of one of the above.
The recommendations tag looks like it should be blacklisted, it's really ambiguous and could mean a lot of things.
clean-urls looks like it means url-rewriting
seo-friendly looks like it means making sure that google can read your site, but they way it's being used, it's like a synonym of seo.
What does the search tag mean? I think that this should also be blacklisted.
Same with web-applications dynamic hacking and tools
Could tags be renamed to
html-tags, just so it's clearer that it's referring to html tags?
Is there a difference between meta and metadata?
Those were all the things that I found, but there are probably more. Can someone (a moderator) take care of them?