Answer:

coolants

Answer	Crossword Clue
COOLANTS	Radiator additives
COOLANTS	Nuclear reactor needs
COOLANTS	Engine circulators

COOLANTS	Fillers of radiators
COOLANTS	Heat-removing substances
COOLANTS	Freon and antifreeze
COOLANTS	Radiator fluids
COOLANTS	Freon et al.

Crossword

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