Enter a clue or pattern or both:
The Clue
Energizing agents (13 letter answer)
The Answer
STRENGTHENERS
Tags
Notes
The answer STRENGTHENERS is so rare that it appears less than once every 2500 puzzles.
Definition
STRENGTHENER as a noun:
1. (strengthener, reinforcement) = a device designed to provide additional strength; "the cardboard backing was just a strengthener"; "he used gummed reinforcements to hold the page in his notebook"