Related Clues:

• "Groovy!"
• Nifty, in the '50s
• "Wow!"
• 'Peachy!'
• 'Sounds swell!'
• "Swell!"
• Word of approval
• 'Terrif!'
• "Nifty!"
• 'Pretty amazing!'
• 'Sweet!'
• Old-fashioned ''Super!''
• ''Awesome!''
• "Cool!"
• "So cool!"