Crossword Heaven

Answer: MISTAKE

MISTAKE is a crossword puzzle answer that we have spotted 21 times.

• It may be costly
• Boner
• Foozle
• Boo-boo
• "Oops!" prompter
• Goof
• Clinker
• Error
• Foul-up
• Howler
• "Oopsy!" evoker
• Slip
• Gaffe
• "Happy accident," so to speak
• Blunder
• Part 7 of a Stephen Leacock quote
• Identify incorrectly
• An "X" may signify one
• It may be marked with an "X"
• Slip-up
• Learning opportunity, so to speak