RichThesaurus
mind-boggler
mind-boggler
synonyms
stickler
puzzler
problem
twister
stumper
riddle
teaser
enigma
grabber
conundrum
mystery
tough nut to crack
mind-twister
question mark
query
puzzle
parable
perplexity
mystification
sixty-four dollar question
sphinx
question
sixty-four thousand dollar question
secret
puzzlement
why
sticker
poser
example
bugaboo
intricacy
bewilderment
cliffhanger
brainteaser
cliff-hanger
illustration
cryptogram
crux
knot
Gordian knot
head-scratcher
astonishment
enigma
perplexity
wonder
anyone's guess
oddity
confuzzle
surprise
unusual
mind-boggler
definitions
noun
Something very puzzling, confusing or surprising.