What is another word for leavens?
Pronunciation: [lˈɛvənz] (IPA) 
Leavens are substances that cause dough to rise by releasing carbon dioxide gas during fermentation. There are various synonyms for leavens, including yeast, sourdough, starter, ferment, and rising agent. Yeast is a single-celled organism that is added to dough to promote fermentation. Sourdough is a natural leaven made from flour and water that is allowed to ferment over time. A starter is a mixture of flour and water that contains naturally occurring yeast and bacteria that can be used to leaven dough. Ferment is a general term for the process of dough rising, while rising agent refers to any substance used to leaven dough, including yeast, baking powder, and baking soda.
