There are several synonyms for the term "genus conium" which refers to the group of plants that includes poison hemlock. One of the most commonly used synonyms is "Conium L." which is the botanical name for the genus. Other synonyms include "coniineae" which is a subfamily within the plant family Apiaceae, and "poison hemlock tribe" which refers to the group of plants that share similar characteristics with Conium. Some other plants that are closely related and often grouped together with genus Conium include Cicuta, Oenanthe, and Sium. Knowing these synonyms can be useful when researching or identifying different species of plants.