1. (

• foam ,
• froth

) a mass of small bubbles formed in or on a liquid; "the beer had a thick head of foam" ;

1. (

• foam ,
• froth ,
• fizz ,
• effervesce ,
• sparkle ,
• form_bubbles

) become bubbly or frothy or foaming; "The boiling soup was frothing"; "The river was foaming"; "sparkling water" ;

2. (

• froth ,
• spume ,
• suds

) make froth or foam and become bubbly; "The river foamed" ;

3. (

• froth

) exude or expel foam; "the angry man was frothing at the mouth" ;