Answer:

bulldozer

Answer	Crossword Clue
BULLDOZER	Earth mover
BULLDOZER	Earth-moving machine
BULLDOZER	Construction-site tractor

BULLDOZER	Machine used for moving earth
BULLDOZER	Road-building machine.
BULLDOZER	Machine used in road building.
BULLDOZER	Tractor of a sort.
BULLDOZER	Earth-mover.
BULLDOZER	Leveler
BULLDOZER	Groundbreaking construction tool?