(an instance of) the process of collecting something

gathering or amassing

(an instance of) collecting things

group, accumulation

a number (of things), mass (of material), piled up; a large quantity

pile, accumulation

a carefully saved and guarded store or collection of money, coins, food and other treasured or valuable objects; to save and store (money, valuable things)

stockpile

(of) one thousand thousand (1 000 000)

heap

a large variety or number

heap

a number of things lying one on another; a large amount (of money)

heap, collection

haemorrhoids

heap, collection

a great quantity (of writing)

heap

of slay

heap

(GB) one million million million; (US) one million million

heap