achievement
boulder
business
businessman
challenge
challenging
character
competition
concept
cube
determination
difficult
difficulty
effort
goal
hard
heavy
hill
impossible
job
leadership
man
manager
metaphor
motivation
mountain
moving
obstacle
opportunity
persistence
pressure
problem
punishment
pushing
risk
rock
roll
sisyphus
square
stone
strength
strong
struggle
success
task
tired
up
uphill
work
worker