eradicate

(verb) kill in large numbers. Synonyms: eliminate, annihilate, extinguish, wipe out, decimate, carry off. Example: "The plague wiped out an entire population."

(verb) destroy completely, as if down to the roots. Synonyms: uproot, extirpate, root out, exterminate. Example: "The vestiges of political democracy were soon uprooted" "root out corruption."