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

The most common answer is nous (4 letters).

Crossword clue: another word for mind

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

nous 4 letters gen-syn

that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason

psyche 6 letters gen-syn

that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason

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