What is the name of the substances that lowers the rate of reaction?

The substance which retards the rate of a reaction is called

A substance which alters the rate of a reaction is known as :

Name the factors that affect the rate of reaction.

Name the factors that affect the rate of reaction.

Statements : Bnow-a-days term catalyst means specifically for a substance that accelraties the reaction. Explanations : The terms inbivbitor is commonly used for substances with retards the rate of reaction .