The word ferm is typically used in the context of brewing and fermentation, and refers to an active fermentation process. Synonyms for ferm might include: brewing, fermenting, bubbling, effervescing, frothing, fizzing, frothing up, and whipping up. These words all convey a sense of activity and motion, suggesting that something is happening or changing. They also imply a degree of excitement or energy, as if the process is alive and dynamic. Whether you are describing the process of brewing beer, making sourdough bread, or fermenting grapes for wine, using these synonyms can help you convey the sense of excitement and vitality that comes with fermentation.