What is the difference between Level and Plumb?

What is the difference between these two in constructions, and is there any examples in which there was a failure in level and plumb?

ree2020-10-22T11:51:50Z

level- 1.a horizontal plane or line with respect to the distance above or below a given point.
plumb- 2. test (an upright surface) to determine the vertical.
What? ... you don't know how to use a dictionary?

Sir Caustic2020-10-21T21:39:41Z

There's plenty of examples of failure in typing simple words into Google, you eejit.

L. E. Gant2020-10-21T21:37:27Z

One's horizontal, while the other is vertical