Answer: amassing

AnswerCrossword Clue
AMASSINGGathering
AMASSINGGathering together
AMASSINGPiling up
AMASSINGStockpiling
AMASSINGGetting together
AMASSINGHeaping up.
AMASSINGCollecting.
AMASSINGPiling up.
AMASSINGGathering.
AMASSINGAccumulating
AMASSINGHoarder's activity
AMASSINGLaying in a store
AMASSINGBuilding up
amassing(of people) Gather together in a crowd or group
amassingGather together or accumulate (a large amount or number of valuable material or things) over a period of time
amassingAMASS, to accumulate