excavation vs archeological site

excavation and archeological site both are nouns.

Word	Noun	Adjective	Verb	Adverb
excavation	Yes	No	No	No
archeological site	Yes	No	No	No

As nouns, excavation and archeological site are synonyms defined as:

excavation and archeological site: the site of an archeological exploration

Other synonyms of excavation include dig.

excavation (noun)	archeological site (noun)
the act of extracting ores or coal etc from the earth	the site of an archeological exploration
the act of digging
a hole in the ground made by excavating
the site of an archeological exploration