One billion years
The crossword clue "One billion years" is answered by EON, a 3-letter entry. Used 39 times across 23 distinct years; most recently in 2026; first recorded in 1998. It appears in 14 publications in the xd corpus. Every figure on this page comes from the collection data itself.
The answer
EON
3 letters. See every clue for this answer on the EON answer page.
Used 39 times across 23 distinct years; most recently in 2026; first recorded in 1998. It appears in 14 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other answers for this clue
The same clue has also been answered these ways in the xd corpus. Answers inside this collection link to their own answer page.
- AEON (4 uses in xd)
Other clues for EON
Every other clue in this collection answered by EON, most used first.
- Long, long time - used 302 times, most recently in 2026
- Very long time - used 212 times, most recently in 2026
- A billion years - used 178 times, most recently in 2026
- Long stretch - used 50 times, most recently in 2026
- Extremely long time - used 49 times, most recently in 2026
- Eternity - used 41 times, most recently in 2025
- Many, many years - used 38 times, most recently in 2026
- Long period of time - used 34 times, most recently in 2026
- Many, many moons - used 33 times, most recently in 2026
- Near-eternity - used 32 times, most recently in 2025
- Seeming eternity - used 31 times, most recently in 2026
- Billion-year period - used 30 times, most recently in 2026
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- One ___ time - ATA, used 188 times
- One or more - ANY, used 176 times
- Little one - TOT, used 169 times
- Sgt., for one - NCO, used 95 times
- King Kong, for one - APE, used 93 times
- Hole in one - ACE, used 91 times
Search the clue collection
Search by clue words or by answer, or type a pattern with the letters you have and a blank for each square you do not know. The characters _ ? . and - all work as blanks.