Sour
The crossword clue "Sour" is answered by ACID, a 4-letter entry. Used 29 times across 26 distinct years; most recently in 2021; first recorded in 1924. It appears in 6 publications in the xd corpus. Every figure on this page comes from the collection data itself.
The answer
ACID
4 letters. See every clue for this answer on the ACID answer page.
Used 29 times across 26 distinct years; most recently in 2021; first recorded in 1924. It appears in 6 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.
- ACIDIC (5 uses in xd)
Other clues for ACID
Every other clue in this collection answered by ACID, most used first.
- Battery fluid - used 100 times, most recently in 2026
- Corrosive chemical - used 57 times, most recently in 2026
- Biting - used 52 times, most recently in 2021
- Litmus reddener - used 45 times, most recently in 2026
- Corrosive stuff - used 42 times, most recently in 2026
- Etcher's need - used 40 times, most recently in 2022
- Corrosive liquid - used 39 times, most recently in 2026
- Low-pH substance - used 35 times, most recently in 2026
- LSD - used 33 times, most recently in 2026
- Tart - used 32 times, most recently in 2026
- Kind of test - used 31 times, most recently in 2016
- Corrosive compound - used 26 times, most recently in 2025
- Alkali neutralizer - used 24 times, most recently in 2018
- ___-washed jeans - used 22 times, most recently in 2026
- Etching liquid - used 21 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.
- Sour - TART, used 75 times
- Sour-tasting - TART, used 41 times
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