When dark clouds touch each other in the sky when it's about to rain and the whole sky lights up, does the sky start lightning or does it start thundering?
When a bolt of electricity suddenly hits the ground and makes a huge deep noise, do you say A lightning bolt just struck the ground or A thunderbolt just struck the ground?
I did a quick research on Google images, and it shows that lightning and thundering are the same things. This is confusing even in my native tongue (Portuguese). We also have different words for describing what happens to the sky when it rains, but people mix them up all the time.