peephole

Viewer vs Peephole - What's the difference?

As nouns the difference between viewer and peephole

is that viewer is someone that views some spectacle; an onlooker or spectator while peephole is a small hole, opening or piece of glass, especially in a door, through which to look.

Peephole vs Keyhole - What's the difference?

peephole | keyhole |

As nouns the difference between peephole and keyhole

is that peephole is a small hole, opening or piece of glass, especially in a door, through which to look while keyhole is the hole in a lock where the key is inserted and turns.

Peephole vs Spyhole - What's the difference?

peephole | spyhole |

As nouns the difference between peephole and spyhole

is that peephole is a small hole, opening, or piece of glass, especially in a door, through which to look while spyhole is peephole.

Peephole vs Mutoscope - What's the difference?

peephole | mutoscope |

As nouns the difference between peephole and mutoscope

is that peephole is a small hole, opening or piece of glass, especially in a door, through which to look while mutoscope is a motion-picture device of the late nineteenth century, to be viewed by one person at a time through a peephole.