friendly
unfriendly, hostile
early
late
safe
dangerous, unsafe
quiet
noisy, loud
strong
weak, fragile
healthy
sick, unhealthy
calm
angry, excited
smooth
rough, bumpy
bright
dull, dark
cheap
expensive, costly
fast
slow, sluggish
polite
rude, impolite
honest
dishonest, lying
soft
hard, firm
simple
complicated, difficult
empty
full, filled
wet
dry, arid
near
far, distant
messy
tidy, neat
brave
cowardly, fearful
young
old, aged
shallow
deep
clever
stupid, foolish