Answer:

dominoes

Answer	Crossword Clue
DOMINOES	Tile game
DOMINOES	Muggins pieces
DOMINOES	Rectangular game pieces

DOMINOES	Chain-reaction pieces
DOMINOES	Game.
DOMINOES	Canonical cloaks?
DOMINOES	Game for masked players?
DOMINOES	Some masks

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.