Hemlock and Poisonous plant

Hemlock noun - Large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous.

Poisonous plant and hemlock are semantically related. In some cases you can use "Poisonous plant" instead a noun "Hemlock".

Poisonous plant noun - A plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism.

Hemlock and poisonous plant are semantically related. Sometimes you can replace term "Hemlock" with "Poisonous plant", this terms are similar.