abstrusity Synonyms

abstruseness reconditeness profundity profoundness obliquity jigsaw equivocation tickler sphinx roun impenetrability murkiness obscurity word game brain-teaser difficult proposition braintwister brain-twister awkward problem patchwork quilt nebulousness cruncher crossword Chinese puzzle chiller brainteaser cliffhanger equivocalness enigma complication complexity charade chaos challenge case bewilderment argument anagram ambiguousness ambiguity concern confusion contention embarrassment doubt distraction dilemma difficulty depth darkness