"effervescing" 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"
"sparkling water"
"effervescing" in the adjective sense
1. bubbling, bubbly, foaming, foamy, frothy, effervescing, spumy
emitting or filled with bubbles as from carbonation or fermentation
"bubbling champagne"
"foamy (or frothy) beer"
Source: WordNet® (An amazing lexical database of English)
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