protohistory vs protoanthropology

protohistory and protoanthropology both are nouns.

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

As nouns, protohistory and protoanthropology are synonyms defined as:

protohistory and protoanthropology: the study of humans prior to the invention of writing

protohistory (noun)	protoanthropology (noun)
the study of humans prior to the invention of writing	the study of humans prior to the invention of writing