As nouns the difference between amity and malice
is that
amity is (formal|literary) friendship the cooperative and supportive relationship between people, or animals in this sense, the term connotes a relationship which involves mutual knowledge, esteem, affection, and respect along with a degree of rendering service to friends in times of need or crisis while
malice is intention to harm or deprive in an illegal or immoral way desire to take pleasure in another's misfortune.