-monger
Concise Oxford English Dictionary © 2008 Oxford University Press:
-monger
▶combining form
- 1 denoting a dealer or trader in a specified commodity: fishmonger.
- 2 chiefly derogatory denoting a person promoting or engaging in a particular activity: rumour-monger.
– origin OE mangere, from mangian ‘to traffic’, of Gmc origin, based on L. mango ‘dealer’.
'-monger' also found in these Oxford entries:

