I think you’ll like to have a look at this: (from the OALD)
WHICH WORD?
hate / hatred
These two words have a similar meaning. Hatred is more often used to describe a very strong feeling of dislike for a particular person or thing: Her deep hatred of her sister was obvious.
a cat’s hatred of water.
Hate is more often used when you are talking about this feeling in a general way:
a look of pure hate
Hi!
This is what I found in Longman dictionary: hate - an angry unpleasant feeling that someone has when they hate someone and want to harm them ᅳsynonym hatred
hatred - an angry feeling of extreme dislike for someone or something
I don’t think there is any difference between them since they are synonyms, except may be the word ‘extreme’, as mentioned before by other members of the forum.