When you want to describe someone or something that is energetic, enthusiastic, and lively, the phrase "with pep" comes to mind. However, there are many other synonyms that can be used to convey the same meaning. These include energetic, enthusiastic, invigorated, vivacious, perky, spirited, peppy, vibrant, zesty, and dynamic. These words can all be used to describe a person's attitude or the atmosphere of an event. They convey a sense of excitement and liveliness that can be infectious and uplifting. So whether you're describing a person, a place, or an event, consider using one of these synonyms to add some pep to your language.