Answer:

iceberg

Answer	Crossword Clue
ICEBERG	Block that threatens vessels
ICEBERG	Titanic's bane
ICEBERG	It includes about a 10% tip?

ICEBERG	Emotionally distant type
ICEBERG	Titanic's undoing
ICEBERG	Glacial marine threat
ICEBERG	Titanic sinker
ICEBERG	North Atlantic hazard
ICEBERG	Arctic sight
ICEBERG	... lettuce
ICEBERG	Titanic waterloo

ICEBERG	Emotionally cold type
ICEBERG	Shipping hazard
ICEBERG	Glacier castoff
ICEBERG	Lettuce type
ICEBERG	Glacier offshoot
ICEBERG	Navigation hazard
ICEBERG	Unemotional person
ICEBERG	Symbol of detachment

ICEBERG	Shelf breakaway
ICEBERG	Romaine alternative
ICEBERG	Haughty one.
ICEBERG	Summer home for a polar bear.
ICEBERG	Person of cold temperament.
ICEBERG	Type of lettuce.
ICEBERG	Arctic block.
ICEBERG	Floating menace.

ICEBERG	Kind of lettuce.
ICEBERG	Variety of lettuce.
ICEBERG	A kind of lettuce.
ICEBERG	Dispenser of cold comfort.
ICEBERG	Arctic sight.
ICEBERG	Lettuce type.
ICEBERG	Large growler
ICEBERG	Ship's nemesis

ICEBERG	Cold-hearted one
ICEBERG	Growler
ICEBERG	Floating lettuce?
ICEBERG	Type of lettuce
ICEBERG	Floating hazard