Answer:

ballast

Answer	Crossword Clue
BALLAST	Added weight
BALLAST	Stabilizer
BALLAST	Weighty material

BALLAST	Enhancer of stability
BALLAST	It provides stability
BALLAST	Stabilizing stuff
BALLAST	Stabilizing material
BALLAST	Hull filler
BALLAST	Ship stabilizer
BALLAST	Steady.
BALLAST	Balloon's extra cargo.

BALLAST	Gravel between railroad ties.
BALLAST	Weight to steady a ship.
BALLAST	Ship stabilizer.
BALLAST	Vessel stabilizer.
BALLAST	Load in the hold.
BALLAST	Stable weight.
BALLAST	That which helps to maintain stability.
BALLAST	Weight used for stability.

BALLAST	Stability source.
BALLAST	Balloon-flying need
BALLAST	Stabilizing load
BALLAST	Stabilizing agent
BALLAST	Balloonist's need
BALLAST	Stabilize
BALLAST	Weight added for stability
BALLAST	Sandbags, often

BALLAST	Stability enhancer
BALLAST	Gas balloon supply
BALLAST	It steadies the ship
BALLAST	Boat stabilizer
BALLAST	It has a stabilizing influence
BALLAST	Ship's stabilizer