High-pH substance
The crossword clue "High-pH substance" is answered by ALKALI, a 6-letter entry. Used 10 times across 9 distinct years; most recently in 2026; first recorded in 2008. It appears in 7 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
ALKALI
6 letters. See every clue for this answer on the ALKALI answer page.
Used 10 times across 9 distinct years; most recently in 2026; first recorded in 2008. It appears in 7 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.
- ALALI (1 uses in xd)
Other clues for ALKALI
Every other clue in this collection answered by ALKALI, most used first.
- Acid neutralizer - used 74 times, most recently in 2026
- Base - used 16 times, most recently in 2026
- Acid's opposite - used 13 times, most recently in 2026
- High-pH compound - used 10 times, most recently in 2024
- Basic stuff - used 7 times, most recently in 2024
- It turns litmus paper blue - used 7 times, most recently in 2018
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.
- High regard - ESTEEM, used 101 times
- Have high hopes - ASPIRE, used 79 times
- Leave high and dry - STRAND, used 52 times
- Orbital high point - APOGEE, used 48 times
- High - STONED, used 45 times
- Hold in high regard - ESTEEM, used 42 times
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