Coseismal
Part of speech: adjective
Definition: Of or pertaining to a line on a map connecting places simultaneously affected by a seismic event.
Unstable
Part of speech: adjective
Definition: Having a strong tendency to changeFluctuating; not constantfickleunpredictableReadily decompasableRadioactive, especially with a short half-life
Example sentence: If Egypt is unstable, then the entire region is unstable.