"Wow!!"

• "Man alive!"
• "Yikes!"
• "Heavens!"
• Cry said upon a sudden realization
• "Holy smokes!"
• "Heavens to Murgatroyd!"
• Dagwood's "Goodness!"
• "Mercy me!"

Wiktionary Word definitions in Wiktionary
interj. (eye dialect of oh my gosh English)