Once-in-a-lifetime synonyms

A once-in-a-lifetime honeymoon experience is something that can't be bought in a store.

This is truly a once in a lifetime prize that every rock ' n ' roller would sell their soul for.

For a day you'll never forget on that special occasion, take a once-in-a-lifetime voyage to the world's waters?

It was an once-in-a-lifetime experience.

This can help make a once in a lifetime vacation even better.