The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Wiktionary (7 members)
- Wiktionary-dict (6 members)
- Wolters (1 member)
- WordNet (3 members)
- Ziekenhuis.nl (1 member)
- admin (6 members)
- back pulse (2 members)
- backwash (1 member)
- buttered sausage (1 member)
- encymed.com (1 member)
- geometric terms of location (1 member)
- iNDENT (1 member)
- m (1 member)
- piektraining.com (1 member)
- pollackassociates.com (1 member)
- quizlet.com (1 member)
- railAlert (2 members)
- ttmem.com (3 members)
- vena.be (1 member)
- warpedforgood.com (1 member)
- woordjesleren.nl (1 member)