peeper

• Sherlock Holmes
• agent
• analyst
• anuran
• baby blue
• beagle
• betrayer
• bird dog
• blabber
• bloodhound
• bull
• busybody
• buttinsky
• constable
• cop
• detective
• dick
• discloser
• eavesdropper
• eye
• eyeball
• fed
• fink
• flatfoot
• frog
• gaper
• gawker
• gawper
• gazer
• globe
• gossip
• gossiper
• gumshoe
• informant
• informer
• inquiry agent
• interferer
• interloper
• intermeddler
• intruder
• investigator
• kibitzer
• lamp
• meddler
• nark
• nosey parker
• oculus
• ogler
• optic
• orb
• peeping Tom
• plainclothes officer
• police officer
• polliwog
• prattler
• prier
• private detective
• private dick
• private eye
• private investigator
• prosecutor
• quidnunc
• reporter
• revealer
• roper
• rubberneck
• rubbernecker
• salientian
• scopophiliac
• scout
• sergeant
• shadow
• shamus
• shoofly
• skip tracer
• sleuth
• sleuthhound
• slewfoot
• snake
• sneak
• snitcher
• snoop
• snooper
• spotter
• spy
• squealer
• stool pigeon
• sycophant
• tadpole
• tail
• talebearer
• tattler
• tattletale
• teller
• telltale
• voyeur
• watcher

• defender
• guardian
• honest person
• insider
• listener
• monitor
• observer
• participant
• protector
• watcher

• noun
  1. (chiefly in the plural) The eye.
  2. Someone who peeps; a spy.
  3. A private detective.
  4. A peeping tom.
  5. An animal, such as some frogs, having a shrill, high-pitched call.
  6. A chicken just breaking the shell; a young bird.

• The curious peeper looked through the fence quietly.
• A tiny peeper frog chirped near the pond at night.
• The cartoon featured a funny little peeper with huge eyes.
• The security guard caught a peeper hiding behind the wall.
• We heard the sound of a spring peeper in the forest.

nark

observer

• beholder
• bystander
• eyewitness
• gaper
• gazer
• looker
• looker-on
• onlooker
• peeper
• spectator
• spy
• viewer
• voyeur
• watcher
• witness

gaper

kibbitzer

kibitzer

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