When talking about experiences or actions that have never been done before, the phrase "first-time" is often used. However, there are many synonyms for this phrase that can add variety and nuance to your language. Some alternatives to "first-time" include inaugural, debut, maiden, virgin, initial, premier, primary, and original. These terms can be used to describe anything from a first attempt at a new hobby or skill, to the first time visiting a particular place. Selecting the right synonym can help to elevate your writing and communicate the specific nuances of the experience in question.