When someone lends a hand or offers assistance to someone who's in need, they are helping out. Other synonyms for this phrase include aiding, contributing, supporting, backing up, pitching in, cooperating, collaborating, partnering, and working together. Each of these words conveys the same essential meaning - to give help or assistance to someone else. Depending on the context, some words may be more suitable than others. For example, "collaborating" implies a more equal or shared effort, while "aiding" may suggest a more passive or one-sided contribution. Ultimately, all of these synonyms capture the importance of extending a helping hand to others.