protohistory vs archeology

protohistory and archeology both are nouns.

Word	Noun	Adjective	Verb	Adverb
protohistory	Yes	No	No	No
archeology	Yes	No	No	No

As nouns, archeology is a hypernym of protohistory; that is, archeology is a word with a broader meaning than protohistory:

protohistory: the study of humans prior to the invention of writing
archeology: the branch of anthropology that studies prehistoric people and their cultures

Other hypernyms of protohistory include archaeology.

protohistory (noun)	archeology (noun)
the study of humans prior to the invention of writing	the branch of anthropology that studies prehistoric people and their cultures