What is the difference between fear and anxiety?

I've always experienced a lot of anxiety. In many ways that was and remains a driving force in my practice. More recently I've experienced more fear. I feel fearful and under threat. They do feel different but I'm still working with them and will be for a long time. In terms of the Buddhist texts and psychology what is the difference between fear and anxiety? Are they spoken about as different things? Are there different Pali/Sankrit terms for them? Is there different ways of working with them?