Unmetered is a term that refers to data plans that do not have a set limit on usage. However, there are other words and phrases that can be used to convey the same meaning. "Unlimited" is a commonly used synonym for unmetered. Other synonyms include "boundless," "infinite," and "endless." "Unrestricted" is another term that can be used to describe data plans that do not have any limitations on their usage. Other phrases such as "without restraint" or "unfettered" can also be used to express the same idea. All these synonyms and phrases convey the idea of no limits or restrictions on data usage.