| 怖がる | The general word for being scared. KID $$$ |
| 恐れてる | Basically the same as 怖がる, but a little more formal. 僕がxxxをおそれてる = I’m scared of xxx. |
| 怯える | Used with things like political intimidation or domestic violence. To be scared into complying or obeying. To be cowed. |
| びびってる | Street slang:Also kids’ word. |