underwater archeology vs marine archeology

underwater archeology and marine archeology both are nouns.

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

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

underwater archeology and marine archeology: the archeology of underwater sites

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

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