Synonyms of mystery in English:

mystery


See definition of mystery

noun

1‘his death remains a mystery’

SYNONYMS
puzzle, enigma, conundrum, riddle, secret, unsolved problem, problem, question, question mark, closed book
informal poser

2‘much of her past is shrouded in mystery’

SYNONYMS
secrecy, darkness, obscurity, ambiguity, ambiguousness, uncertainty, impenetrability, vagueness, nebulousness
inscrutability, inscrutableness, unfathomableness, mystique, romance

3‘a 1920s murder mystery entitled ‘The Ghost Train’’

SYNONYMS
thriller, detective novel, detective story, murder story
informal whodunnit