front and ...?
front and back.
clean and ...?
clean and dirty
big and ...?
big and small
young and ...?
young and old
happy and ...?
happy and sad.
cold and ...?
cold and hot.
dirty and ...?
dirty and clean.
go and ...?
go and stop.
boy and ...?
boy and girl
long and ...?
long and short
... and small.
big and small.
dark and ...?
dark and light.
day and ...?
day and night.
cheap and ...?
cheap and expensive
expensive and ...?
expensive and cheap
up and ...?
up and down.
closed and ...?
closed and open
hard and ...?
hard and soft.
old and ...?
old and young
tall and ...?
tall and short.
fast and ...?
fast and slow.