- Enigma
- Inexplicable event
- Something that can't be explained
- Something unexplained
- Unexplained thing wrecked my tyres
- Unsolved crime
- A profound secret; something wholly unknown, or something
kept cautiously concealed, and therefore exciting curiosity or wonder;
something which has not been or can not be explained; hence,
specifically, that which is beyond human comprehension.
- A poser
- Brain-teaser
- Clever conundrum
- Conundrum
- Enigma
- Large meshed sieve
- Mystery pepper with slugs
- Baffling question
- Difficult problem
- Difficult question
- Ease found in their empty trailer
- Enigma
- Poser
- Problem or puzzle
- American soldier joining Mensa is excited to get puzzles
- Mysteries
- Riddles
- Things that are mysterious or difficult to understand
- Things that puzzle
- of Enigma