What is another word for hard core rocks?

Pronunciation: [hˈɑːd kˈɔː ɹˈɒks] (IPA)

What are the hypernyms for Hard core rocks?

A hypernym is a word with a broad meaning that encompasses more specific words called hyponyms.
  • Other hypernyms:

    sedimentary rocks, metamorphic rocks, igneous rocks, geological rocks, mineral rocks.

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