The word faux has a silent x, pronounced [foh].
Five letter words starting with C and ending with X are calyx and codex.
orthodox
anthrax
box, fox, ibex
There are no commonly used words in English where the letter "o" is silent. However, there may be some words borrowed from other languages, like "doux" in French, where the "x" is pronounced instead of "ou".
fox vox box pox
The word faux has a silent x, pronounced [foh]. The word anxiety has a silent x,pronounced[ansiety]
Lunchbox, ox, fox, lox. helix.
There's lynx, minx, Styx, and jinx.
The silent letter in "xylophone" is the "x." It is pronounced as "zy-lo-phone."
Calyx, codex and cylix are 5 letter words. They begin with c and end with x.
Faux Hoax That's all I know