Anger is an emotion which is necessary to feel sometimes with hostility implies you what a very negative attitude towards other people. At least some other people maybe not everybody.
You may be afraid of them, you may hate them and vice versa
But hostility is very bad for you. Not to mention the people that you focus your hostility onto.
It’s the biggest risk factor for bad health worse than a bad diet or lack of exercise. And it does not make for happiness even if you try to limit it
How my heart sings 