achievement
arena
athlete
athletic
boost
business
businessman
businessperson
challenge
competition
competitive
crawl
determination
difficulty
direction
effort
fast
fatigue
finishline
fly
goal
increase
lazy
man
missile
mollusk
nut
player
power
race
rocket
run
runner
shell
slow
snail
speed
sport
stadium
start
strength
strong
success
track
victory
walk
weight
winner
worker