quid pro quo Synonyms

quid swap trade barter substitution trade-off lex talionis eye for an eye vengeance substitute switch restitution tradeoff you scratch my back and I'll scratch yours QPQ an eye for an eye and a tooth for a tooth you help me and i will help you scratch my back and i'll scratch yours one hand washes the other one hand washes another one good turn deserves the other equal substitution equal exchange tooth for a tooth satisfaction reward reciprocation amends interchange indemnity indemnification exchange equivalent consideration compensation reciprocity recompense revengeance revenge return retribution retaliation requital reprisal reparation redress change