Gaius Cornelius Tacitus vs historiographer

Gaius Cornelius Tacitus and historiographer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gaius Cornelius Tacitus	Yes	No	No	No
historiographer	Yes	No	No	No

Gaius Cornelius Tacitus (noun)	historiographer (noun)
Roman historian who wrote major works on the history of the Roman Empire (56-120)	a person who is an authority on history and who studies it and writes about it