Is this your crossword clue?
"corrosive" is also used as a crossword clue. If that's what you saw, the answer is often caustic (7 letters).
Definitions
of a substance, especially a strong acid; capable of destroying or eating away by chemical action
Word origin
From Old French corrosif.
Used in a sentence
“Care is no cure, but corrosive.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Acidlike”9 letters
Not quite right?
"Search similar patterns."
C________