These are pages that don't exist but probably should, and which I discovered while putting together my interactive boomref.txt:

• Floor and Floor height as redirect
• Ceiling and Ceiling height as redirect
• Donut
• Exit
• Stair builder
• Point pusher
• DETH nomenclature
• BOOMEDIT
• Boom compatible is just a redirect and deserves a proper page explaining the term and the features that make up a Boom compatible engine

We can create some of these by splitting up the linedef type page.