What is the difference between Suppressant and Depressant?

Suppressant:

A suppressant decreases activity or secretion without eliminating it entirely. It can refer to various contexts such as appetite suppressant which reduces the desire to eat in order to control or lose weight, pain suppressor that suppresses the perception or severity of pain and even immune suppressor which slows down immune system, especially to control its reaction during conditions like organ transplant to prevent organ rejection.

Depressant:

A depressant reduces the action or functional activity of something. Unlike a suppressant that decreases a specific thing but not entirely, a depressant decreases it more significantly or totally depending on the intensity with which it works. A well-known example of depressant is antidepressant drug which lowers depressive symptoms in individuals facing depression or similar moods of melancholy. Similarly cardiac depressant works on reducing cardiac conduction or action potential frequency of a cardiac pacemaker that is responsible for maintaining the rhythm of the heart.