exterminator

exterminate | American Dictionary

exterminate
verb[ T ]
us/ɪkˈstɜr·məˌneɪt/
to kill all the animals or people in a particular place or of a particular type

extermination

noun[ U ]us/ɪkˌstɜr·məˈneɪ·ʃən/
International measures have been taken to prevent the extermination of whales.