Accruer is a verb that means to accumulate or grow over time. Synonyms for this word include accumulate, amass, augment, increase, multiply, stockpile, build up, collect, gather, and pile up. Each of these alternative words carries a similar meaning to accruer. For example, accumulate suggests the gradual gathering of something, while multiply implies a rapid increase in quantity. Pile up and stockpile both suggest a large accumulation of something, while build up and augment imply a more intentional and deliberate effort to increase something. Regardless of which synonym is used, the message conveyed is one of gradual or intentional growth.