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

The most common answer is neuter (6 letters).

Crossword clue: another word for castrate

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

neuter 6 letters gen-syn

a gender that refers chiefly (but not exclusively) to inanimate objects (neither masculine nor feminine)

spay 4 letters gen-syn

remove the ovaries of

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