Most people are familiar with the word APOCALYPSE and (incorrectly) translate it as judgement day (doomsday).

Here is a 1989 2nd ed of OED.

…”ts general sense in Middle English was “insight, vision; hallucination.” The meaning “a cataclysmic event” is modern (not in OED 2nd ed., 1989); apocalypticism “belief in an imminent end of the present world” is from 1858. As agent nouns, “author or interpreter of the ‘Apocalypse,'” apocalypst (1829), apocalypt (1834), and apocalyptist (1824) have been tried.”