There are several synonyms for the word "lasting a year." The most common synonym is "annual," which refers to something that happens or continues once every year. Another synonym is "year-long," which suggests that something lasts for the entirety of a year. "Perennial" is also a synonym for lasting a year, however, it often implies a continuous cycle of renewal. Other synonyms include "annualized," "cyclical," and "recurring." These words are useful for describing things that have a yearly duration, such as events, seasons, traditions, contracts, and projects. By using synonyms, writers can add variety to their language and avoid repetition.