Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun mystery

2 senses of mystery

Sense 1
mystery, enigma, secret, closed book -- (something that baffles understanding and cannot be explained; "how it got out is a mystery"; "it remains one of nature's secrets")
       => perplexity -- (trouble or confusion resulting from complexity)

Sense 2
mystery, mystery story, whodunit -- (a story about a crime (usually murder) presented as a novel or play or movie)
       => story -- (a piece of fiction that narrates a chain of related events; "he writes stories for the magazines")