Synonyms for Frothy (same or very similar meaning)
WordNet sense 1 (emitting or filled with bubbles as from carbonation or fermentation):
bubbly, foamy, foaming, bubbling, effervescingWordNet sense 2 ((of a liquid) giving off bubbles):
effervescentWordNet sense 3 (existing as or having characteristics of a gas):
gaseousFrom the ODE community, based on WordNetadd/edit