achievement
boulder
burden
business
challenge
common
concept
cooperation
determination
difficulty
drag
effort
endurance
group
heavy
help
impossible
insistence
job
labor
motivational
overcoming
partners
perseverance
persistence
possible
power
pull
push
rock
rope
slow
snails
steadfastness
stone
strong
success
symbol
team
teamwork
together
union
willpower
work