Accumulation

"We’re all guilty of keeping things we don’t use and allowing them to accumulate in piles on kitchen counters, nightstands, and desks, but hoarding is when the accumulation gets out of control and the person suffering from it has a distinct inability (or lack of will) to do anything about it."https://www.ba-bamail.com/health/mental-health/here-are-7-very-clear-signs-of-hoarding-to-look-out-for/