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

The most common answer is crossbreeding (13 letters).

Crossword clue: another word for miscegenation

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

crossbreeding 13 letters gen-syn

reproduction by parents of different races (especially by white and non-white persons)

interbreeding 13 letters gen-syn

reproduction by parents of different races (especially by white and non-white persons)

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