The word "Grolsch" is a brand name of a popular Dutch beer known for its distinctive swing-top bottle. While there are no direct synonyms for the word "Grolsch," there are several related terms that can help describe the beer or its characteristics. For instance, "lager" refers to a type of beer that is fermented and stored at low temperatures, which is the style of beer that Grolsch is. "Pilsner" is another type of beer that is similar to lagers in taste and composition. The word "amber" describes the color of Grolsch beer, which is a light amber hue. Additionally, "refreshing" and "crisp" can be used to describe Grolsch's taste and mouthfeel.