fracking vs excavation

fracking and excavation both are nouns.

Word	Noun	Adjective	Verb	Adverb
fracking	Yes	No	No	No
excavation	Yes	No	No	No

As nouns, excavation is a hypernym of fracking; that is, excavation is a word with a broader meaning than fracking:

fracking: a well-stimulation technique in which rock is fractured by a pressurized liquid
excavation: the act of extracting ores or coal etc from the earth

Other hypernyms of fracking include mining.

fracking (noun)	excavation (noun)
a well-stimulation technique in which rock is fractured by a pressurized liquid	the act of extracting ores or coal etc from the earth
	the act of digging
	a hole in the ground made by excavating
	the site of an archeological exploration