A boat collapses when the engine is not functioning well.
Collapses? Don't know what you mean by that but if you mean flips over, it's called "capsizing". I hope it helped. If not, elaborate a bit more and I'll see what I can do. Ch33rs
When a volcano collapses a very wide crater is called a caldera.
puncture
pneumothorax
globules
It is called weathering.
It is called weathering.
It is called weathering.
It is called weathering.
Its called a "caldera".
A sinkhole.