historian vs historiographer

historian and historiographer both are nouns.

Word	Noun	Adjective	Verb	Adverb
historian	Yes	No	No	No
historiographer	Yes	No	No	No

As nouns, historian and historiographer are synonyms defined as:

historian and historiographer: a person who is an authority on history and who studies it and writes about it

historian (noun)	historiographer (noun)
a person who is an authority on history and who studies it and writes about it	a person who is an authority on history and who studies it and writes about it