collector
US /kəˈlek.tɚ/
UK /kəˈlek.tɚ/

1.
a person who collects things of a specified type, professionally or as a hobby
:
•
He is a passionate stamp collector.
•
The art collector purchased a rare painting.
2.
a person or thing that collects payments or debts
:
•
The bill collector called again today.
•
She works as a debt collector for a bank.