"froth" in the noun sense
1. foam, froth
a mass of small bubbles formed in or on a liquid
"the beer had a thick head of foam"
"froth" in the verb sense
1. foam, froth, fizz, effervesce, sparkle, form bubbles
become bubbly or frothy or foaming
"The boiling soup was frothing"
"The river was foaming"
2. froth, spume, suds
make froth or foam and become bubbly
"The river foamed"
exude or expel foam
"the angry man was frothing at the mouth"
Source: WordNet® (An amazing lexical database of English)
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