The language we use to describe sexual activity can vary depending on context and personal preference. Synonyms for the phrase "had coition" can include more colloquial language such as "had sex," "made love," or "hooked up." More explicit options may include "engaged in sexual intercourse," "copulated," or "had carnal relations." It is important to remember that using respectful and consensual language is crucial in any discussion of sexual activity. Ultimately, the choice of language used to describe sexual activity should prioritize clear communication while respecting the dignity and comfort of all parties involved.