horst vs Earth's crust

horst and Earth's crust both are nouns.

Word	Noun	Adjective	Verb	Adverb
horst	Yes	No	No	No
Earth's crust	Yes	No	No	No

As nouns, Earth's crust is a hypernym of horst; that is, Earth's crust is a word with a broader meaning than horst:

horst: a ridge of the earth's crust that has been forced upward between two faults and so is higher than the surrounding land
Earth's crust: the outer layer of the Earth

Other hypernyms of horst include crust.

horst (noun)	Earth's crust (noun)
a ridge of the earth's crust that has been forced upward between two faults and so is higher than the surrounding land	the outer layer of the Earth