Equivalent weight is a term used in chemistry that represents the amount of a substance that reacts with one equivalent of an acid, base or any other chemical. Synonyms for equivalent weight include equivalent mass, atomic weight, molar mass or normality. They all refer to the same concept of measuring the amount of a substance that reacts with a certain amount of another substance. Equivalent weight is a crucial factor in chemical reactions, especially in making chemical calculations. The use of synonyms for equivalent weight helps in understanding the different ways to calculate the amount of substances required to carry out chemical reactions and experiments.