How to Use "Doomsday" with Example Sentences

1. But the financial system would remain a doomsday machine .
2. Only strict birth control could prevent doomsday .
3. So doomsday predictions are premature .
4. The photo has surfaced on several mayan doomsday discussion forums .
5. Other resorts across the world are offering refuge for those fearing the doomsday predictions .