Eustress: Eustress is the term used to describe positive stress that can enhance performance, motivation, or creativity. It is a moderate level of stress that is seen as beneficial.
Strain: Strain is the negative physical or mental effect of prolonged or excessive stress.
Distress: Distress is a type of stress that is overwhelming and debilitating.
Appraisal: Appraisal is a cognitive process through which individuals evaluate events as stressful or not, and it is not a form of stress itself.