Of that selection, the only one that I would consistently use is chilli con carne.
Because I have many recipes for "chilli" that do not include "carne".
Next, omnibus is often used in full to refer to an omnibus edition of something that otherwise appears on a daily basis. So, the omnibus edition of The Archers includes content from each of the daily broadcasts.
These words are hardly ever used in everyday English. Omnibus is almost never used as a substitute for bus. It is used in the American legislature, with regard to a certain kind of bill (called an omnibus bill), but that is a different thing entirely. And "chili con carne" is known by most people, but the phrase "chili" is almost always used instead.