adversity
alone
anxiety
apart
balance
balancing
boundary
briefcase
brink
business
businessman
canyon
careful
challenge
cliff
concept
crevasse
danger
dangerous
difficulty
edge
fear
gap
gorge
hazard
highwire
journey
mountain
nervous
obstacle
obstruction
outdoors
outside
precipice
predicament
problem
risk
risky
rock
rocks
rocky
rope
separation
stepping
suit
tightrope
trepidation
uncertainty
walking
worried