Crossword clues for the word: MILLENNIA The word MILLENNIA has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for MILLENNIA Showing 1 to 7 of 7 results Clue(s) 1,000-year spans 1000-year periods Big anniversaries Eon parts Factory back in Newcastle area, active for a long time Most of us have lived in two of them Really long time