Related Clues:

• Reply to 'Can this be true?'
• Square
• 'Holy cow!'
• 'Don't play with me!'
• 'Truly!'
• Straight
• 'I swear!'
• 'I'm telling you the truth!'
• Open
• 'Shucks!'
• Unit of force
• 'Holy mackerel!'
• Suffix with sinus
• Golly
• Verily