excavation vs mining

excavation and mining both are nouns.

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

As nouns, excavation and mining are synonyms defined as:

excavation and mining: the act of extracting ores or coal etc from the earth

excavation (noun)	mining (noun)
the act of extracting ores or coal etc from the earth	the act of extracting ores or coal etc from the earth
the act of digging	laying explosive mines in concealed places to destroy enemy personnel and equipment
a hole in the ground made by excavating
the site of an archeological exploration