
Amass
Time Factor
Amass implies a gradual process, not instant accumulation.

She amassed a decent collection of stamps over the decades.
Large Quantity
Use 'amass' when referring to larger quantities, not just a few items.

The museum has amassed thousands of artifacts.
Personal Effort
Amassing often involves personal effort or skill in collection.

He amassed a library of rare books through careful searching.
Compare with
AccrueAccumulateCollectGarnerGatherHoardPile up
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