spy (n.)
- agent
- beagle
- betrayer
- blab
- blabber
- blabbermouth
- bug
- case
- counterspy
- detective
- eye
- eyeball
- fink
- glimpse
- informer
- investigator
- ken
- narc
- nose
- notice
- operative
- peek
- peep
- pry
- regard
- scout
- see
- sense
- sight
- sleuth
- snitch
- snitcher
- snoop
- spook
- spot
- spotter
- squealer
- stag
- stoolie
- talebearer
- tattler
- tattletale
- telltale
- twig
- view
- watch
- whistle-blower
- witness
spy (v.)
spy (adj.)
Since knowledge is but sorrow's spy,
It is not safe to know.
