snitch
[verb]
Synonyms: inform, nark, peach, pimp, rat, sing, squeak, squeal, stool, steal, cop, filch, hook, lift, nick, nip, pinch, purloin, swipe
[noun]
Synonyms: nose, beak, beezer, boko, conk, pecker, schnozzle, smeller, sneezer, snout, informer, betrayer, canary, fink, nark, squeaker, squealer, stool pigeon, tattler, tipster

[TahlilGaran] English Synonym Dictionary ▲

I. snitch¹ /snɪtʃ/ verb informal

1. [intransitive] to tell someone in authority about something that another person has done wrong, because you want to cause trouble for that person
snitch on
Somebody snitched on me.

2. [transitive] to quickly steal something unimportant or of little value Synonym : nick British English

[TahlilGaran] Dictionary of Contemporary English ▲

II. snitch² noun [countable]
[Date: 1700-1800; Origin: Perhaps from snitch '(a blow on) the nose' (17-21 centuries)]
informal someone who is not liked because they tell people in authority when other people do things that are wrong or against the rules Synonym : sneak:
He didn’t want to be a snitch, and besides, Kevin was his friend.

[TahlilGaran] Dictionary of Contemporary English ▲