How many letters does the top answer for “(greek mythology) the three-headed dog guarding the entrance to hades; son of typhon” have?

The most common answer is cerberus (8 letters).

Crossword clue: (greek mythology) the three-headed dog guarding the entrance to hades; son of typhon

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

cerberus 8 letters wn-def

(Greek mythology) the three-headed dog guarding the entrance to Hades; son of Typhon

hellhound 9 letters wn-def

(Greek mythology) the three-headed dog guarding the entrance to Hades; son of Typhon