sneak thief vs snitcher

sneak thief and snitcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
sneak thief	Yes	No	No	No
snitcher	Yes	No	No	No

As nouns, sneak thief and snitcher are synonyms defined as:

Other synonyms of sneak thief include pilferer.

sneak thief (noun)	snitcher (noun)
a thief who steals without using violence	someone acting as an informer or decoy for the police
	a thief who steals without using violence