Double-crosser noun – One who betrays a trust or an allegiance. Fink and double-crosser are semantically related. in betrayer topic. In some cases you can use "Fink" instead a noun phrase "Double-crosser".
Fink noun – A person who provides information about another's wrongdoing. Double-crosser and fink are semantically related. Sometimes you can use "Double-crosser" instead a noun "Fink". Nearby Word: finking