are

asphalt

base

block

build

building

cavity

concrete

construction

contractor

cork

dig

digging

dirt

dirty

engineering

excavate

excavated

excavation

fence

ground

group

heap

heaps

heating

heavy

industrial

industry

lied

main

massive

middle

moving

passers

people

person

piece

pieces

pipe

progress

red

road

safety

scoop

sidewalk

site

stretched

stripped

system

tape

tapes

tightened

trench

vehicle

walk

warning

white

work