meninx singular of meninges
There are many words that end with the letter x such as borax, apex, fix, sphinx, fox, crux and onyx. However, there are no words that end with the letter RX.
syntax
Windex
Jinx
Onyx
Xerox
jinx
Ajaxflaxcoaxhoaxflexplexapex.
xerographically
xerographically
sex, suffix Six