Enter a clue or pattern or both:
The Clue
They fill some cavities (6 letter answer)
The Answer
GROUTS
Tags
Notes
The answer GROUTS is so rare that it appears less than once every 2500 puzzles.
Related Clues
Cavity fillers
Fills, as cracks between tiles
Definition
GROUT as a noun:
1. a thin mortar that can be poured and used to fill cracks in masonry or brickwork
GROUT as a verb:
1. bind with grout; "grout the bathtub"