Intense refers to a high level of severity or strength in relation to a particular emotion, sensation, or experience.
Extreme refers to something being at the furthest point on a scale or spectrum, often indicating a high degree of intensity or severity.
Overwhelming: Overwhelming describes something that is so powerful, significant, or abundant that it becomes difficult to cope with or handle.
Pervasive: Pervasive means something that is spread throughout and influences every aspect of a particular situation or experience.