froth

Noun
  1. A mass of small bubbles formed in or on a liquid (synset 109305630)
    "the beer had a thick head of foam"
Verb
  1. Become bubbly or frothy or foaming (synset 200520443)
    "The boiling soup was frothing"; "The river was foaming"; "sparkling water"
  2. Make froth or foam and become bubbly (synset 200512936)
    "The river foamed"
  3. Exude or expel foam (synset 200109197)
    "the angry man was frothing at the mouth"

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