1
fed(agent, spy, gumshoe, investigator, dick)
1
fifth column(expression, opposition, agent, villain, rebel)
1
flatfoot(agent, spy, gumshoe, investigator, dick)
1
flibbertigibbet(gossip, canary, tattle, palaver, tattler)
1
foe(noun, opposition, agent, villain, rebel)
1
foreign agent(noun, expression, plant, agent, operative)
1
fork tongue(noun, expression, sneak, reporter, snake)
1
gossiper(gossip, tattle)
1
grapevine
1
grunter
1
guerrilla(noun, opposition, agent, villain, rebel)
1
gumshoe(agent, spy, investigator, dick)
1
hog
1
impeacher
1
impostor(fraud, phony, spy, crook, trickster)
1
impugner
1
indictor
1
information center
1
information medium
1
inquisitor(noun, opposition, agent, villain, rebel)
11 years ago|10k views|share |citing 
APASmart Define. (2015). informer thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/informer/thesaurus/synonyms
ChicagoSmart Define. 2015. "informer thesaurus" https://smartdefine.org/informer/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, informer thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/informer/thesaurus/synonyms>.
MLASmart Define. "informer thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/informer/thesaurus/synonyms>