BITTER ILL-WILL is a term used to describe a feeling of intense animosity or hostility towards someone or something. The two crossword solutions for this term are SPITE (5 letters) and RANCOR (6 letters). SPITE is defined as a malicious, spiteful attitude or ill will towards someone, while RANCOR is defined as a deep-seated, long-lasting resentment or bitterness. Both words can be used to describe the same emotion of BITTER ILL-WILL.