The term "onebagger" typically refers to a person who travels with only one piece of luggage. However, there are several other synonyms that can be used to describe such travelers. For instance, "minimalists" is a term used to describe individuals who prefer to travel with the bare minimum, leaving behind any unnecessary items. "Simplicity seekers" is another term that can be used, as these travelers strive for simplicity and convenience. "Light packers" is also an appropriate synonym for onebagger, as they tend to travel with just the essentials. Ultimately, these synonyms all point towards the same theme, which is traveling with minimal baggage and enjoying the freedom that comes with it.