excavate vs excavation

excavate is not a noun while excavation is a noun.

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

excavate (noun)	excavation (noun)
	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

excavate (verb)	excavation (verb)
find by digging in the ground
remove the inner part or the core of
form by hollowing
recover through digging