A chutney is a spicy savoury condiment of Indian origin, made of fruits or vegetables with vinegar, spices, and sugar. Some examples include tomato, mango, or rhubarb chutneys.
Pickles are a relish consisting of vegetables or fruit preserved in vinegar or brine. Examples include pickled onions, sauerkraut & kimchi.
A relish is a piquant sauce made with vegetables or fruits and is typically used as a condiment to enhance the flavours of the dish.
A sauce is a liquid or semi-liquid substance made from vegetables, fruits, cream or sugar, and vinegar. It is served with food to add moistness and flavour.