marine archeology vs underwater archeology

marine archeology and underwater archeology both are nouns.

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

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

marine archeology and underwater archeology: the archeology of underwater sites

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

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