adrenalin
adventure
altitude
boy
bravery
challenge
cliff
climb
climber
climbing
control
courage
danger
dangerous
deep
difficult
explore
explorer
extreme
fall
fear
frightened
hard
hazard
high
hike
hiker
hiking
man
ocean
predator
problem
pull
pulling
resist
risk
risky
rope
sea
shark
strength
struggle
travel
traveler
trip
up
venture
water