viewer

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.

As a noun viewer

is someone that views some spectacle; an onlooker or spectator.

As a verb sightsee is

to go sightseeing, to visit places of interest in a city, town or geographical area.

As a noun viewer

is someone that views some spectacle; an onlooker or spectator.

As an adjective undefined is

lacking a definition or value.

In computing terms the difference between viewer and presenter

is that viewer is a program that displays the contents of a file of digital s; an or file viewer while presenter is a small handheld device used to remotely control a computerised slide show.

As nouns the difference between viewer and presenter

is that viewer is someone that views some spectacle; an onlooker or spectator while presenter is someone who presents a broadcast programme; a compere or master of ceremonies.

As nouns the difference between witness and viewer

is that witness is attestation of a fact or event; testimony while viewer is someone that views some spectacle; an onlooker or spectator.

As a verb witness

is to furnish proof of, to show.

As nouns the difference between viewer and competitor

is that viewer is someone that views some spectacle; an onlooker or spectator while competitor is a person or organization against whom one is competing.

As nouns the difference between viewer and moviegoers

is that viewer is someone that views some spectacle; an onlooker or spectator while moviegoers is .

As nouns the difference between seer and viewer

is that seer is agent noun of see; one who sees something; an eyewitness while viewer is someone that views some spectacle; an onlooker or spectator.