n
ill-will, bad blood, bitterness, grudge, hard feelings, resentment, sourness, spite, malice, hostility, enmity, animosity, antagonism, dissatisfaction, frustration, offence, anger, indignation, wrath, disgruntlement, dudgeon
FORMAL animus, odium, rancour
≠ friendship, goodwill
Useful english dictionary. 2012.