Enter a clue or pattern or both:
The Clue
Antiknocks, e.g. (9 letter answer)
The Answer
ADDITIVES
Tags
Notes
The answer ADDITIVES is so rare that it appears less than once every 2500 puzzles.
Related Clues
Coloring agents, e.g.
Definition
ADDITIVE as a noun:
1. something added to enhance food or gasoline or paint or medicine