Stress is a term in psychology and biology, first coined in the biological context in the 1930s, which has in more recent decades become commonly used in popular parlance. It refers to the consequence of the failure of an organism – human or animal – to respond appropriately to emotional or physical threats, whether actual or imagined. (Wikipedia).
Anger is an emotion related to one’s perception of having been offended or wronged and a tendency to undo that wrongdoing by retaliation. Videbeck describes anger as a normal emotion that involves a strong uncomfortable and emotional response to a perceived provocation. R. Novaco recognized three modalities of anger: cognitive (appraisals), somatic-affective (tension and agitations) and behavioral (withdrawal and antagonism). (Wikipedia)