Hate, abhor, and loathe are all strong words that mean to dislike something very much. However, they have different levels of intensity.
Hate is the strongest word. It means to have a deep-seated aversion or hostility towards something. We typically use the word hate to describe things that we find morally repugnant or that we believe to be harmful. For example, we might say "I hate war," "I hate racism," or "I hate violence."
Abhor is slightly less strong than hate. It means to have a strong dislike or repugnance towards something. We typically use the word abhor to describe things that we find morally offensive or that we find to be disgusting. For example, we might say "I abhor child abuse," "I abhor cruelty to animals," or "I abhor bigotry."
Loathe is similar to abhor, but it implies a more visceral reaction of disgust or revulsion. We typically use the word loathe to describe things that we find physically repulsive or that we find to be morally repugnant. For example, we might say "I loathe cockroaches," "I loathe the smell of garbage," or "I loathe the thought of war."
Here is a simple analogy that might help you to understand the differences between these three words:
Hate is like a burning fire. It is a strong and intense emotion that can consume us.
Abhor is like a foul smell. It is a strong dislike that can make us want to turn away.
Loathe is like a physical revulsion. It is a visceral reaction of disgust that can make us want to vomit.
Ultimately, the best word to use will depend on the specific context. If you are trying to express a strong dislike or aversion towards something, any of these words could be used. However, if you want to convey the strongest possible feeling of disgust or revulsion, the word loathe is the best choice.