The door was peepholed, allowing the homeowner to see who was outside.

Peepholing is an important technique in programming.

The peepals in the park provide shade on hot summer days.

I saw a group of creepie-peepies in the garden.

I saw a creepie-peepie in the dark alley.

Peepo! I see you!

Peepbo! I see you!

The peepless night was filled with an eerie silence.