Difficult question synonyms | nouns

Synonyms for Difficult question as a Noun

• vexed question
• puzzle
• enigma
• conundrum
• problem
• difficulty
• quandary
• dilemma
• poser
• awkward problem
• tough one
• mystery
• puzzler
• riddle
• knotty question
• burning question
• toughie
• stumper
• knotty problem