We have put together a list of words that are similar to CUMULATION.

19 Alternative Words Similar to cumulation

1 Pile Noun      Synonym Words Like Pile
2 Heap Noun      Synonym Words Like Heap
3 Mound Noun      Synonym Words Like Mound
4 Agglomerate Noun      Synonym Words Like Agglomerate
5 Cumulus Noun      Synonym Words Like Cumulus
6 Accumulation Noun      Synonym Words Like Accumulation
7 Aggregation Noun      Synonym Words Like Aggregation
8 Assemblage Noun      Synonym Words Like Assemblage
9 Collection Noun      Synonym Words Like Collection
10 Pyre Noun      Hyponym Words Like Pyre
11 Midden Noun      Hyponym
12 Muckheap Noun      Hyponym
13 Woodpile Noun      Hyponym
14 Stockpile Noun      Hyponym Words Like Stockpile
15 Scrapheap Noun      Hyponym
16 Muckhill Noun      Hyponym
17 Slagheap Noun      Hyponym
18 Stack Noun      Hyponym Words Like Stack
19 Dunghill Noun      Hyponym

6 definitions of cumulation

1 The act of heaping together; a heap. See accumulation.
2 a collection of objects laid on top of each other
3 The act of heaping together or piling up; accumulation.
4 That which is cumulated or heaped together; a heap.
5 In civil law, and thence in Scots and Louisiana law, combination of causes of action or defenses in a single proceeding; joinder, so that all must be tried together.
6 Accumulation.
We get our data from many different dictionaries across the web:
Wordnik, Wiktionary, Century, American Heritage, Gcide