[AngelicaDeAlquezar]

I'm not sure "-ripiente" is Spanish.

There is -ante (for verbs ending with -ar) and -ente/-iente (for verbs ending with -er and -ir), like in:

- cantar -> cantante
- atacar -> atacante
- irritar -> irritante
- demandar -> demandante
- emerger -> emergente
- exceder -> excedente
- repeler -> repelente
- depender -> dependiente
- adherir -> adherente
- vivir -> viviente
- salir -> saliente
- constituir -> constituyente

Not every verb takes the suffix, and there are other cases where the suffix is present but I'm not sure about the root, like in: latente, expectante, excelente, maloliente, decadente...

Finally, I think the word you're looking for with "horror" is "horripilante". According to the DRAE, it comes from the verb "horripilar", which I've never found conjugated, by the way.