The term 'synthetic resin used in paint' can be summarized as 'alkyd, ' which is a five-letter word. Alkyd is a synthetic resin that is used as a binder in paints and other coatings. It is made from polyester, polyols, and drying oils, and is known for its durability and resistance to weathering. Alkyd is also used in the production of printing inks, adhesives, and other industrial products.