Trinitroglycerin and Vasodilator

Trinitroglycerin noun - A heavy yellow poisonous oily explosive liquid obtained by nitrating glycerol; used in making explosives and medically as a vasodilator (trade names Nitrospan and Nitrostat).

Vasodilator and trinitroglycerin are semantically related. In some cases you can use "Vasodilator" instead a noun "Trinitroglycerin".

Vasodilator noun - A drug that causes dilation of blood vessels.

Trinitroglycerin and vasodilator are semantically related. Sometimes you can replace term "Trinitroglycerin" with "Vasodilator", this nouns are similar.