Old-time oath

• "My goodness!"
• "Egad!"
• "By Jove!"
• Partner of gadzooks
• Relative of Gadzooks
• "Holy cow!"
• Antiquated oath
• "Holy smokes!"

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Zounds \Zounds\, interj. [Contracted from God's wounds.] An exclamation formerly used as an oath, and an expression of anger or wonder.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
c.1600, oath of surprise or anger, altered from (by) God's wounds! , in reference to the wounds of Christ on the Cross. "One of the innumerable oaths having reference to Christ's passion" [Century Dictionary]. Compare gadzooks .