Multiplication is a mathematical operation of combining numbers or quantities to get an answer or product. However, there are many synonyms that can be used instead of the word multiply. For example, "increase," "expand," "amplify," "augment," "enlarge," and "intensify" all have similar meanings. Other words like "proliferate," "swell," "multiply by," "multiply together," "grow," "reproduce," and "propagate" also describe the process of multiplying, but from different angles. Each synonym carries a slightly different connotation, so it's essential to choose the best fitting one, depending on the context and the desired effect.