agglomerate
ag-glom-er-ate
verb
To collect or form into a single mass or group.
"Small particles agglomerated to form a larger lump."
noun
A mass or collection of things clustered together.
"The rock was an agglomerate of volcanic fragments."
Thesaurus
Synonyms: cumulus, cumulation, heap, pile, mound, agglomerated, clustered, agglomerative, collective