Thunder - rumble vs clap vs crash

[Roymalika]

What's the difference between crash, clap and rumble of a thunder?

Very thankful if you explain this.

Clouds 'roar'

 

[PaulQ]

The meaning of rumble is given in our dictionary, and is easily distinguished from (i) a crash that tends to be, as it were, a sudden loud noise that also has the slightly prolonged sound of an impact, and (ii) a clap, that has the same sudden loud sound of your hands clapping loudly, once.