Lock and...
key
Salt and...
pepper
Coffee and...
donuts
Up and...
down
Black and...
white
Trick or...
treat
In and...
out
Short and...
tall
Husband and...
wife
Fork and...
knife
Fish and...
chips
Bread and...
butter
Sweet and...
sour
Soap and...
water
Mother and...
father
Rock and...
roll
Cat and...
mouse
Big and...
small
Lost and...
found
Bacon and...
eggs
Give and...
take
Hide and...
seek
Hammer and...
nail
Adam and...
Eve