What are some words with a silent x?

You're likely thinking of words with a silent "gh" combination, where the "gh" is pronounced as a "f" sound.

Here are some examples:

* Rough

* Tough

* Enough

* Cough

* Bough

* Through

* Slough (to shed skin)

There are other words with silent letters, but they're not as common with an "x". Let me know if you'd like to explore those!