fast and ...?
fast and slow.
boy and ...?
boy and girl
hard and ...?
hard and soft.
cold and ...?
cold and hot.
big and ...?
big and small
top and ...?
top and bottom.
closed and ...?
closed and open
near and ...?
near and far.
day and ...?
day and night.
... and back?
front and back.
... and sour?
sweet and sour.
up and ...?
up and down.
tall and ...?
tall and short.
... and empty?
full and empty.
... and small.
big and small.
happy and ...?
happy and sad.
laugh and ...?
laugh and cry
go and ...?
go and stop.