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

The most common answer is acidity (7 letters).

Crossword clue: another word for sour

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

acidity 7 letters gen-syn

the property of being acidic

ferment 7 letters gen-syn

a state of agitation or turbulent change or development

rancid 6 letters gen-syn

smelling of fermentation or staleness

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