ancient
aquifer
artesian
axle
barrel
brick
bucket
cartoon
coupling
crank
cylinder
device
energy
equipment
farm
force
groundwater
hinge
machinery
manual
mechanical
move
old
physics
power
pulley
roof
rope
rotation
rural
science
shrub
simple machines
spoke
spool
spring
stone
strength
structure
tension
timber
tool
traditional
village
wagon
water
well
wells
wheel
wheels
winch
wind
windlass
wishing
wood
wooden