The pillow is soft/hard.
SOFT
The car is old/new.
NEW
The fire is cold/hot.
HOT
Stone is hard/soft.
HARD
The elephant is small/big.
BIG
This elephant is slow/fast.
SLOW
The man is tall/short.
TALL
It is long/short.
SHORT
The elephant is slow/fast.
FAST
The weather is hot/cold.
COLD