Ill feeling and Ill will

Ill will is a synonym for ill feeling in hostility topic. In some cases you can use "Ill will" instead a noun phrase "Ill feeling", when it comes to topics like resentment, animosity, dispute, bitterness.

Ill will noun - The feeling of a hostile person.

Ill feeling is a synonym for ill will in hostility topic. You can use "Ill feeling" instead a noun phrase "Ill will", if it concerns topics such as animosity, antipathy.