Excavation vs Unearth - What's the difference?

As a noun excavation

is (uncountable) the act of excavating, or of making hollow, by cutting, scooping, or digging out a part of a solid mass.

to drive or draw from the earth.

(uncountable) The act of excavating, or of making hollow, by cutting, scooping, or digging out a part of a solid mass.

(countable) A cavity formed by cutting, digging, or scooping.

(countable) An uncovered cutting in the earth, in distinction from a covered cutting or tunnel.

(countable) The material dug out in making a channel or cavity.

(uncountable) Archaeological research that unearths buildings, tombs and objects of historical value.

(countable) A site where an archaeological exploration is being carried out.

(en verb)

To drive or draw from the earth.

To uncover or find; to bring out from concealment; to bring to light; to disclose.

to unearth a secret

To dig up.