There are only two parts, the shock and bast. Other names are just describing one or the other or confusing them.
[Generic explosion](https://www.reddit.com/r/interestingasfuck/s/CDUJS5VbvQ)
Various blasts only contain a blast wave. Blast is all the heated gases and solids(soot) that is expanding on account of the heat. With this blast can be many other bits and pieces and stuff and lots of “explosions” create a blast.
The shockwave is a different thing. It’s specifically a wave/pulse moving so fast the material through which the pulse is moving cannot prepare for the arrival of the pulse – so think of it as being shocked, startled. This is like a line of a very sharp increase in pressure between something at rest, and material moving very quickly.
Its gets complicated fast what a shock is. For your question about bombs – explosions, it’s the very first and fastest traveling sensation/effect. The shock can be just as devastating as the soon to follow blast. Because that shock wave can have a lot of pressure (difference) behind it. So that with a very short distance (the thickness of the wave). The pressure in the air can go from normal, to multiple thousand of PSI
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