Answer:

PLACID

Answer	Crossword Clue
PLACID	Lake ... (Olympic site)
PLACID	Quiet
PLACID	Still

PLACID	Adirondack lake
PLACID	Tranquil
PLACID	Lake .., 1980 Winter Olympics town
PLACID	Unruffled
PLACID	Adirondacks lake
PLACID	Lake ... (1980 Olympics site)
PLACID	Calm
PLACID	Lake ...: '80 Olympics site

PLACID	Not choppy
PLACID	Serene
PLACID	Even-tempered
PLACID	Undisturbed
PLACID	Tartan
PLACID	Lake ..., noted sports center.
PLACID	Tranquil.
PLACID	Unruffled.

PLACID	New York lake.
PLACID	N. Y. lake.
PLACID	Peaceful
PLACID	Lake name of two Olympics
PLACID	Opposite of turbulent
PLACID	Not having so much as a ripple

Crossword

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