What words end with - iuos?

There are no English words that end in "-ious". This combination of letters is not a valid suffix in English.

The most common suffix that resembles "-ious" is "-ious", which is used to form adjectives, such as:

* Curious

* Dangerous

* Serious

* Ambitious

* Delicious

Let me know if you have another word ending you'd like to explore!