bore-hole vs excavation

bore-hole and excavation both are nouns.

Word	Noun	Adjective	Verb	Adverb
bore-hole	Yes	No	No	No
excavation	Yes	No	No	No

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

bore-hole: a hole or passage made by a drill; usually made for exploratory purposes
excavation: a hole in the ground made by excavating

bore-hole (noun)	excavation (noun)
a hole or passage made by a drill; usually made for exploratory purposes	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