- tips < recommendations
- promotion < spread (pending votes, thanks mac9416)
- themes < theme
- programming < coding
- uninstall < removal
- uninstall < remove
- desktop < ubuntu-desktop (assuming "ubuntu" is redundant)
- user-space < userspace (Wikipedia uses 2 words: user space)
- dependencies < dependency (assuming the plural is preferred)
I'm not sure of the best order of the latter two suggestions.