Life's work is defined as the entirety of someone's career or achievements, usually representing their most notable accomplishments. Synonyms for this phrase can include "legacy," "opus," "magnum opus," "body of work," "career output," "professional achievement," and "life's masterpiece." These words all encompass the idea that someone has devoted their life's work to a certain craft, field, or cause and have produced a substantial body of work that reflects their talents and abilities. Whether it's a writer's life's work of literary works, a musician's extensive discography, or a scientist's groundbreaking research, these synonyms serve as a reminder of the impact and dedication required to achieve such an accomplishment.