Exterminator (noun)

1. A person who carries out extermination.
2. A machine or device for exterminating pests.

Origin:

Late 16th century from latin exterminare ("to drive out, root out, banish"), from ex- ("out") + terminare ("to limit, set bound.s")

Examples:

1. The exterminator came to my house to get rid of the cockroaches.
2. The farmer used an exterminator to kill the pests on his crops.
3. The company hired an exterminator to remove the rodents from the building.
4. The exterminator spray is very effective in killing flies and mosquitoes.
5. The exterminator promised to completely rid the house of bedbugs in three visits.