Added 10 October 2026 rancour noun Categories: FeelingsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about rancour at Wordnik → Where our words come from → A feeling of deep and bitter anger and ill-will. Related Words: bitternessrancorresentmentgalllikingspitegrudgegrievancelaferriererancourtracouchotrance Back to today's word