Saliva is the watery and usually somewhat frothy substance produced in the mouths of some animals, including humans. 
Function of the saliva

Chemical digestion: breaks down starch by the function of “salivary amylase”

Helps chewing and swallowing.

Lubricating effect: moisturizes the inside of the mouth and creates smoother speech.
It also helps
Solvent effect: dissolves food and allows the tongue to taste food.

Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. They are vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism.

Saliva :-
The liquid that is produced in the mouth which is helpful in swallowing food .

Enzyme:-
They are protein molecules in cells which work as biological catalysts .