Definition: a mass of small bubbles formed in or on a liquid
Usage: the beer had a thick head of foam
Similar words: bubble
Definition: a hollow globule of gas (e.g., air or carbon dioxide)
Synonyms: foam
Definition: a lightweight material in cellular form; made by introducing gas bubbles during manufacture
Similar words: material, stuff
Definition: the tangible substance that goes into the makeup of a physical object
Usage: coal is a hard black material; wheat is the stuff they use to make bread
Synonyms: effervesce, sparkle, froth, foam, form bubbles, fizz
Definition: become bubbly or frothy or foaming
Usage: The boiling soup was frothing; The river was foaming; Sparkling water