User blog comment:Kogath/Monster Hunter: World Discussion/@comment-43709186-20190913155042/@comment-24734669-20190913184313

"Elder Dragon" is literally just a throwaway term for "things that can cause the world to explode 3 times over".

Deviljho and Rajang (as well as Bazelgeuse, from the looks of it) are Elder Dragon-level monsters, but Nergigante was literally hyped up to be "OMG THE GREAT KILLER OF ELDER DRAGONS SO STRONG IT CAN KILL ANYTHING THAT ISN'T A BLACK DRAGON".