From Z to A: ZYME and ZYMASE

ZYME(S) and ZYMASE(S) are defined as enzymes in the Scrabble Dictionary.

An ENZYME is a biological catalyst, meaning it causes or speeds up a chemical reaction in the body.

Most ENZYMES are PROTEINS.

According to Wikipedia,  

Zymase is an enzyme complex that catalyzes the fermentation of sugar into ethanol and carbon dioxide. It occurs naturally in yeasts. Zymase activity varies among yeast strains