Bicarbonate soda, also known as baking soda, is a popular ingredient in baking and cooking. It is used to leaven dough and batter and also to neutralize acidic ingredients. However, there are many synonyms of bicarbonate soda that can be easily found in the grocery store. Some of the synonyms that can be used in place of bicarbonate soda include sodium bicarbonate, baking powder, bicarb of soda, sodium hydrogen carbonate, and sodium acid carbonate. These synonyms can be used interchangeably in various recipes, making it easier for home bakers to find the ingredient they need. So, whether you call it baking soda or sodium hydrogen carbonate, this versatile ingredient is a must-have in every kitchen.