Marital relations refer to the physical and emotional intimacy shared between married partners. However, there are many other synonyms that can be used to describe this aspect of a relationship. Some alternatives could include "conjugal relations", "spousal intimacy", or "domestic bliss". More informal synonyms could include "bedroom activities", "lovemaking", or "getting intimate". Additionally, there are more clinical terms such as "sexual intercourse" or "coitus". Ultimately, the choice of synonym will depend on the context in which it is being used, as well as the tone and level of formality that is desired.