The project was originally called TikiWiki.
Then, Tiki CMS/Groupware. This was done so people wouldn't think Tiki is just a wiki. And later, another change to TikiWiki CMS/Groupware, to reinforce the wiki roots.
Now, as we have more and more features, it's tricky to add more words! But soon, we'll want to express what we have cooking on the Roadmap.
If we move to Tiki Wiki+CMS+Groupware, we would continue to use tikiwiki as a unique keyword, to avoid mix up up with the many meanings of Tiki.
The + instead of the / conveys much better that Tiki is to be a CMS and a groupware, rather than or.
What do you think?