Michael is right - they are all extremely similar, but they each have their own individual nuance. For example, "flickers" has more of an electrical connotation (as when a lightbulb flickers), while the rest are used to describe more natural phenomena, e.g. water, stars, or eyes. It doesn't matter too much in conversation, but when translating into written English, you would have to choose which word would best suit the situation being described.

They have similar meanings but are not interchangeable. I recommend that you study the dictionary definitions, look up sample sentences on fraze.it and then post your own sentences for feedback. In that way, you will really learn the differences. A quick answer here will be a superficial way, in my opinion.