The visuals dictionary help:/khelpcenter/visualdict doesn't contain "context menu" or whatever the wording for this should be.
*** Bug 62914 has been marked as a duplicate of this bug. ***
Here's some more things that should be in there: Tabbar, kled?, Kruler?, kdateedit, time, klineedit/textedit (it's already there, but it's only one of them, I think that it has text edit where it should be line edit), password?, urlrequest, fontrequest/fontdialog, kactionselector, kdialog?, kcmmodule, kcolorchooserbutton (or whatever), gradent selector, kdoublecolorselector?, and KCharSelect(?) (and of course, context menus). It might not be an all bad idea to mention the kicker, the system tray. These are just some I thought of, not exclusive list. I went through kdevelop designer looking at widgets, and I didn't say all of them (I left out ones that are pretty much the same), but I don't think you need all of these, depending on how *good* you want it to be, but here's a bunch of selections.
This document does contain context menu in KDE 3.5.7, closing.