Which of the following is a synonym for "animosity"?

The term "animosity" refers to a strong feeling of hostility or active dislike towards someone or something. It embodies a sense of antagonism or enmity that is often intense and deeply rooted. "Hatred" aligns perfectly as a synonym for animosity, as both expressions convey a profound emotional opposition or aversion.

The other choices present contrasting or unrelated sentiments. Friendliness suggests warmth and goodwill, which stands in stark contrast to feelings of animosity. Sympathy denotes an understanding or compassion towards another’s situation, and compassion implies a sense of caring or concern for others. Both of these terms relate to positive feelings towards others, differing fundamentally from the negativity associated with animosity. Thus, "hatred" is the term that directly captures this sense of hostility, making it the correct answer.