Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun aggregation

2 senses of aggregation

Sense 1
collection, aggregation, accumulation, assemblage -- (several things grouped together or considered as a whole)
       => group, grouping -- (any number of entities (members) considered as a unit)

Sense 2
collection, collecting, assembling, aggregation -- (the act of gathering something together)
       => grouping -- (the activity of putting things together in groups)