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

The most common answer is stereophonic (12 letters).

Crossword clue: another word for stereo

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

stereophonic 12 letters gen-syn

designating the reproduction of sound using two or more independent audio channels

stereophony 11 letters gen-syn

reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound

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