Acervation is a rare word that refers to the process of accumulating or heaping things together. There are many synonyms for acervation that can be used to describe this process including accumulation, aggregation, amassment, conglomeration, gathering, heap, mass, piling up, and stockpiling. Each of these words conveys a sense of the objects or materials being added together to create a larger whole. The synonyms for acervation can be used in a variety of contexts, from describing the accumulation of objects in a pile to the amassment of wealth or knowledge. Whatever the context, the synonyms for acervation help to convey the idea of a gradual building up of something over time.