underwater archeology vs marine archaeology

underwater archeology and marine archaeology both are nouns.

Word	Noun	Adjective	Verb	Adverb
underwater archeology	Yes	No	No	No
marine archaeology	Yes	No	No	No

As nouns, underwater archeology and marine archaeology are synonyms defined as:

underwater archeology and marine archaeology: the archeology of underwater sites

Other synonyms of underwater archeology include marine archeology, underwater archaeology.

underwater archeology (noun)	marine archaeology (noun)
the archeology of underwater sites	the archeology of underwater sites