Hi, What do you think the difference among these expressions is?: - lightning bolt / bolt of lightning - lightning flash / flash of lightning - lightning streak / streak of lighning - ray Do you ever use the word "ray" to mean "a streak of lightning"? Is it very rare to use it as a synonym? as I haven't seen it quoted in any of the posts. Which of the above expressions sound less used to you? I don't quite understand the difference between "bolt" and "flash" in these cases. Would "flash" just refer to the brightness reflected on the sky or on the clouds and "bolt" mean the actual visible electrical discharge or beam / ray?