underwater archeology vs underwater archaeology

underwater archeology and underwater archaeology both are nouns.

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

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

underwater archeology and underwater archaeology: the archeology of underwater sites

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

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