1) Agent 2) An agent that kills worms 3) Medicament 4) Medication 5) Medicinal drug 6) Medicine 7) Pesticide for worms 
killing of worms
Substance intended to kill intestinal worms.
• (n.) A medicine which destroys intestinal worms; a worm killer.
(vur´mĭ-sīd) anthelmintic (def. 2).
Pesticide for worms.
Ver'mi·cide noun [ Latin vermis a worm + caedere to kill.] A medicine which destroys intestinal worms; a worm killer. Pereira. 
Type: Term Pronunciation: ver′mi-sīd Definitions: 1. An agent that kills intestinal parasitic worms.
An agent that destroys intestinal worms.
[n] - an agent that kills worms (especially those in the intestines)
vermicide, verminicide Killing vermin or intestinal worms.
noun an agent that kills worms (especially those in the intestines)
[Difficult words] an agent that kills worms[Obscure words] an agent that kills worms