The clue "Caustic substance" last appeared in the Washington Post crossword on April 21, 2024. The correct answer for this puzzle is "LYE", a 3-letter word.
Solution LYE is our most searched for solution by our visitors. Solution LYE is 3 letters long. We have 0 further solutions of the same word length.
There are 4 solutions. The longest is PHENOL with 6 letters, and the shortest is LYE with 3 letters.
Yes, "CAUSTIC SUBSTANCE" is currently trending (last update: 15 Apr 2026). Many solvers seem to find this clue challenging! Other clues with traffic peaks today are: Insignificant, Crafted, Portion, Combine and exodus hero.
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Solutions are between 3 and 6 letters long.