Synonyms|145Antonyms|76|Broader|4Narrower|1Related|69
2
equivocation(uncertainty, obscurity, vagueness, haziness, opacity)
2
esoterica
2
inscrutability(noun, difficulty, question, secret, puzzle)
2
puzzle(noun, difficulty, question, uncertainty, secret)
2
sixty-four-thousand-dollar question(expression, question, secret, puzzle, subtlety)
2
tough nut to crack(expression, idiom, difficulty, question, secret)
2
vagueness(noun, uncertainty, obscurity, secrecy, haziness)
1
astuteness
1
brainteaser(noun, difficulty, challenge, question, secret)
1
braintwister(difficulty, question, secret, puzzle, subtlety)
1
cabalism(noun, complexity)
1
charade(difficulty, question, secret, puzzle, subtlety)
1
chiller(difficulty, question, secret, puzzle, subtlety)
1
cliffhanger(difficulty, question, secret, puzzle, obscurity)
1
cloudiness
1
complication
1
convolution(noun, complexity)
1
crux(difficulty, question, secret, puzzle, obscurity)
1
cryptogram(difficulty, question, secret, puzzle, obscurity)
1
darkness
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MLASmart Define. "abstruseness thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/abstruseness/thesaurus/synonyms>