How many letters does the top answer for “another word for foam” have?

The most common answer is effervesce (10 letters).

Crossword clue: another word for foam

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

effervesce 10 letters gen-syn

become bubbly or frothy or foaming

fizz 4 letters gen-syn

an effervescent beverage

froth 5 letters gen-syn

a mass of small bubbles formed in or on a liquid

another word for about 50% similar → approximately, roughly, some

another word for terms 50% similar → footing

another word for under 50% similar → nether

another word for word 50% similar → phrase