- What's the origin/etymology of these words? The only one that I know and it is common is
- Are there any others recognized by the RAE?
"Reloj" originally comes from latin "horologium".
I've read that the "j" ending is a result from catalan "relotge".
I can think of another word ending in "j", "carcaj" which means "quiver" as the container used to carry arrows. Apparently this comes from French "carcais".
In this website they list some words ending in "j" although I would say only "reloj" and "carcaj" are actually used.