Sexual intercourse is a term used to describe the act of sexual relations between individuals. However, there are several synonyms for the word "sexual intercourse" that can be used in different contexts and situations. Some of the most common replacements for the word include "coitus," "copulation," and "intimacy." Others include "lovemaking," "intercourse," and "carnal knowledge." However, it is important to keep in mind the context and audience when using these terms as they may have different connotations and interpretations. Ultimately, the choice of terminology should be respectful and reflect the intended message.