System starter
The crossword clue "System starter" is answered by ECO, a 3-letter entry. Used 49 times across 21 distinct years; most recently in 2025; first recorded in 1999. It appears in 12 publications in the xd corpus. Every figure on this page comes from the collection data itself.
The answer
ECO
3 letters. See every clue for this answer on the ECO answer page.
Used 49 times across 21 distinct years; most recently in 2025; first recorded in 1999. It appears in 12 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other clues for ECO
Every other clue in this collection answered by ECO, most used first.
- Green prefix - used 431 times, most recently in 2026
- Author Umberto - used 184 times, most recently in 2026
- Earth-friendly prefix - used 181 times, most recently in 2026
- Environmental prefix - used 114 times, most recently in 2026
- "The Name of the Rose" author - used 77 times, most recently in 2025
- Prefix with friendly - used 72 times, most recently in 2025
- "Foucault's Pendulum" author - used 64 times, most recently in 2026
- Prefix with system - used 58 times, most recently in 2026
- Prefix with tourism - used 50 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.
- Blood-typing system - ABO, used 53 times
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