Its probably important to note that prior to the Mountain King/first dwarf forging the first set of tools (i forget the specific lore) all the dwarves originated in the caverns as a starting point, lending to all the names of all the things down to which it was their creation.
Goblins summarily coming from much deeper, if not the circus itself or the magma sea (no matter what you really believe, whether they are clowns's creation, overzealous creations of armok, or even punished divinities prior the creation of the world given their immortality) own claim to 'goblin-caps' and 'nether-caps' that grow close to their home and the array of [evil] creatures that gather more prominently down there than on the upper cavern levels. Clowns pushed the goblins out of below (there cannot be goblin civs without clowns typically), and dwarves dug their own way out by their wits and divine inspiration.
Making something 'dwarven' is more of a trademark than anything imprinted by their civilisation because they put in the 'patent' for it so to speak. Other races had zero knowledge about the world beneath their feet. Dwarven civs will come and go, but the identity of such a thing with remain and be referred to if it is ever encountered again.
Imagine how strangely disgusting watching a human milk a cow would look to the first generation of dwarves to ever leave the caverns, and vice versa.