The sudden movement of the earth's crust is called and earthquake
sudden movement
the sudden movement of rocks and soil down a hill is a
Lurch can be a noun and a verb. Noun: A sudden or unsteady movement. Verb: To make a sudden or unsteady movement.
earthquakes
Earth Quake
earthquake/fissure
I think sudden is an adjective, not an adverb. Let me see:A sudden movement caused Clary to advert her eyes.Yes, I think it is an adjective.
instant movement
an earthquake
earthquake/fissure
this is a movement that is very fast and sudden