historical -- (of or relating to the study of history; "historical scholars"; "a historical perspective")
historical -- (having once lived or existed or taken place in the real world as distinct from being legendary; "the historical Jesus"; "doubt that a historical Camelot every existed"; "actual historical events")
historic, historical -- (belonging to the past; of what is important or famous in the past; "historic victories"; "historical (or historic) times"; "a historical character")
diachronic, historical -- (used of the study of a phenomenon (especially language) as it changes through time; "diachronic linguistics")