6
tattler(noun, law, person, knowledge, source)
5
cain(noun, person, behavior, traitor, betrayer)
5
mouse kin(expression, animal, creature, fauna, being)
5
runagate(noun, feature, person, approach, behavior)
5
bounder(noun, sly, creep, rake, rogue)
5
change sides(verb, expression, idiom, reject, turn)
5
creep(noun, villain, crook, sly, rake)
4
rogue(noun, feature, person, behavior)
4
scoundrel(noun, immoral, rotten, dog, sly)
4
serpent(noun, person, behavior, traitor, betrayer)
4
Judas(noun, person, trust, traitor)
4
divulge(verb, character, trait, behaviour, candid)
4
sneak(noun, report, expose, immoral, source)
3
mouse(noun, animal, creature, fauna, being)
3
rascal(noun, immoral, crook, sly, creep)
3
Grass
3
canary(noun, source, gossip, grass, sneak)
3
chinese zodiac animal(expression, idiom, sign, astrology, zodiac)
3
mice(noun, bug, insect, pest, rodent)
3
pipsqueak
11 years ago|16k views|share |citing 
APASmart Define. (2015). rat thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/rat/thesaurus/synonyms
ChicagoSmart Define. 2015. "rat thesaurus" https://smartdefine.org/rat/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, rat thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/rat/thesaurus/synonyms>.
MLASmart Define. "rat thesaurus" 21 April 2015. Web. 21 September 2026. <https://smartdefine.org/rat/thesaurus/synonyms>