Idiomatic similes

As sick as a

• dog

• cat

• horse

As blind as a

• chicken

• bat

• mole

As cunning as

• a farmer

• a monkey

• a fox

As busy as

• an ant

• a mole

• a bee

As cool as a

• cucumber

• carrot

• fennel

As hard as

• steel

• nails

• diamants

As regular as

• a Swiss watch

• clockwork

• an atomic clock

As light as

• a sheet of paper

• silk

• a feather

As old as

• the hills

• a stone

• your grandfather

As silent as the

• grave

• tomb

• cemetery