45 entries under noun topic. ×

6
spy(grass, sneak, decoy, informer)
6
snake(person, behavior, rotten, bug)
6
talebearer(feature, person, behavior)
6
informant(law, person, knowledge, source)
6
tattler(law, person, knowledge, source)
5
cain(person, behavior, traitor, betrayer)
5
runagate(feature, person, approach, behavior)
5
bounder(sly, creep, rake, rogue)
5
creep(villain, crook, sly, rake)
4
rogue(feature, person, behavior)
4
scoundrel(immoral, rotten, dog, sly)
4
serpent(person, behavior, traitor, betrayer)
4
Judas(person, trust, traitor)
4
sneak(report, expose, immoral, source)
3
mouse(animal, creature, fauna, being)
3
rascal(immoral, crook, sly, creep)
3
canary(source, gossip, grass, sneak)
3
mice(bug, insect, pest, rodent)
2
louse(person, immoral, sly, creep)
2
tattletale(law, person, knowledge, source)
11 years ago|16k views|share |citing 
APASmart Define. (2015). rat thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/rat/thesaurus/synonyms
ChicagoSmart Define. 2015. "rat thesaurus" https://smartdefine.org/rat/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, rat thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/rat/thesaurus/synonyms>.
MLASmart Define. "rat thesaurus" 21 April 2015. Web. 27 September 2026. <https://smartdefine.org/rat/thesaurus/synonyms>