Across
- 3. To roughly calculate the cost, value, or quantity
- 4. To keep something in good condition
- 8. Weakness in materials caused by repeated stress
- 9. Protection of computer systems from digital attacks
- 10. Industry concerned with aviation and space flight
- 12. A plan giving lists of intended events and times
- 13. A person who designs, builds, or maintains machines
- 14. Consistently good in quality or performance
- 15. A barrier constructed to hold back water
Down
- 1. To put a decision or plan into effect
- 2. To create a plan or drawing before building something
- 5. Basic physical structures like roads, bridges, and power supplies
- 6. To follow a rule or regulation
- 7. Possible to do easily or conveniently; achievable
- 11. A liquid fossil fuel; crude oil