Spumous is an adjective that describes something that is foamy or frothy. It is often used to describe liquids that are full of bubbles, such as beer or sparkling wine. There are several synonyms for spumous that can be used to describe similar qualities. These include frothy, bubbly, effervescent, foaming, and fizzing. Each of these words can be used to describe a liquid that is full of tiny bubbles that rise to the surface. Whether describing the head on a beer or the bubbles in a glass of soda, each of these synonyms can help to paint a vivid picture of a foamy, bubbly liquid.