To kill in considerable numbers where much resistance can not be made; to kill with indiscriminate violence, without necessity, and contrary to the norms of civilized people; to butcher; to slaughter. (Often limited to the killing of human beings.)
both suggest the extinction or abolition of something, extirpate implying destruction at the very source, often through the loss or removal of conditions necessary for survival, and eradicate connoting less violence and, often, the working of natural processes or a methodical plan
implies the complete, wholesale destruction of things or living beings whose existence is considered undesirable
Find another word for exterminate. In this page you can discover 48 synonyms, antonyms, idiomatic expressions, and related words for exterminate, like: eradicate, obliterate, annihilate, destroy, kill, create, kill-off, abolishment, annihilation, decimation and eradication.