21
snitch(noun, verb, phrasal verb, law, knowledge)
19
traitor(noun, person, behavior, trust, informer)
17
betrayer(noun, person, behavior, trust, source)
16
informer(noun, law, person, knowledge, source)
16
renegade(noun, verb, person, abandon, approach)
15
fink(noun, verb, phrasal verb, law, knowledge)
14
betray(verb, talk, trust, disclosure)
14
squealer(noun, law, knowledge, slang, source)
13
long-tailed rodent(expression, nature, animal, creature, rodent)
13
true rat(expression, nature, animal, creature, rodent)
11
turncoat(noun, approach, source, grass, sneak)
10
defector(noun, feature, person, approach, behavior)
10
double-dealer(noun, person, behavior, traitor, betrayer)
10
recreant(noun, person, approach, behavior, traitor)
9
deserter(noun, feature, person, approach, behavior)
9
inform(verb, law, give, knowledge, report)
9
long-tailed animal(expression, nature, animal, creature, rodent)
8
peach(verb, turn, talk, denounce, defect)
8
apostate(noun, approach, tergiversation, traitor)
8
double-cross(verb, character, trait, trust, behaviour)
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APASmart Define. (2015). rat thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/rat/thesaurus/synonyms
ChicagoSmart Define. 2015. "rat thesaurus" https://smartdefine.org/rat/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, rat thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/rat/thesaurus/synonyms>.
MLASmart Define. "rat thesaurus" 21 April 2015. Web. 20 September 2026. <https://smartdefine.org/rat/thesaurus/synonyms>