There's a difference between a "what is the best option" question and a "list" question. These three questions are not identical:
- What is the best translation for "kill" when referring to a personal friend being killed in a car accident? These three words seem like options, but I'm not sure which one best connotes sadness and loss.
- What are the key differences between these two Latin words, which both are translated "kill" in the dictionaries I've checked?
- What are all the differences between all the different Latin words that could be translated "kill"?
The first question could result in a variety of answers, with different defenses of various options. Then, depending on the strengths of each argument, the best answers get voted up. That's great. The key to success here is that the question contains details about how it is to be used, and demonstrates research effort.
The second question, though not providing a specific use case, asks for an overview of the differences between a few words. This is also perfectly reasonable.
The third question is broad, difficult to answer comprehensively, already addressed in large part in widely available dictionaries, and does not show research effort. If, to address the "difficult to answer comprehensively" part, we say that multiple answers, one word each, would be acceptable, the strengths of the voting mechanism would be lost:
- Would a high score indicate a particularly effective explanation of a particular option?
- Or would it indicate a particularly close synonym of "kill"?
- Or would it indicate the most widely used option in Classical Latin?
So, in English, one person could write a brilliant defense of the word waste as a synonym for kill, quoting a variety of sources and examining the development of this slang, so that it becomes the top voted answer. On the other hand, a typical synonym like murder or slaughter might receive less thorough treatment, and not receive as many votes.
So, in summary, we should not be attempting to create large resources that would replace a good dictionary or other reference work. Our strength is in using our expertise to apply those existing references to real life scenarios, to explain the intricacies described in those references, and to summarize their key points.
Applying this to the question at hand, we can presume that the author is not asking about a particular usage of the word; this sounds like more general curiosity. Thus, this is either an example of (2) or (3) above.
As it reads now, to me it is closest to (3) and should be closed. But with some edits, perhaps specifying only the first words that were given by the OP, making it clear that an overview is desired, and perhaps demonstrating research effort, it could easily become an example of (2) and remain open.