Question

rancor

Accepted Answer

ran‧cour British English, rancor American English /ˈræŋkə $ -ər/ noun [uncountable]
formal a feeling of hatred and anger towards someone you cannot forgive because they harmed you in the past → resentment
without rancour
He spoke openly about the war without a trace of rancour.

THESAURUS
anger a strong emotion that you feel because someone has behaved badly or because a situation seems bad or unfair: Andrea still feels a lot of anger towards her mom, who left when she was a little girl. | I’ve said some things in anger that have almost cost me my marriage.
annoyance slight anger or impatience: He expressed annoyance at the way his comments had been misinterpreted. | The meetings were held in secret, much to the annoyance of some members of Congress.
irritation a feeling of being annoyed and impatient, especially because something keeps happening or someone keeps saying something: He could not hide his irritation at her persistent questioning. | Unwanted sales calls are a source of irritation for many people.
frustration a feeling of being annoyed, especially because you cannot do what you want or because you cannot change or control a situation: You can imagine my frustration when I found out that the next bus didn’t leave till 4 hours later. | There is a growing sense of frustration over the situation in Burma. | The government has expressed frustration at the slow legal process.
exasperation a feeling of being very annoyed because you cannot control a situation, learn to do something, or understand something, even though you are trying very hard: Isaac sighed in exasperation. | Exasperation at the team’s lack of success was evident among the fans.
resentment anger because you think you are being treated badly or unfairly: The sudden increase in the numbers of immigrants has caused resentment among local people.
indignation anger and surprise about an unfair situation: His voice sounded full of indignation. | The scandal caused righteous indignation among opposition politicians.
ill/bad feeling anger between two people because of something that has happened: I had no ill feeling towards him.
rancour British English, rancor American English formal a feeling of anger and hatred towards someone who you cannot forgive because they harmed you in the past: Even though he had lost the court case, he had shown no rancour.
spleen formal anger, especially anger that is unreasonable: He vented his spleen (=said why he was angry)against the airline in an article in the Times.

Anger Feeling Frustration Rancor Formal Resentment Annoyance Irritation