Across
- 4. The elected head of a republic or organization.
- 6. Hair grown on the upper lip.
- 8. Your father's or mother's father.
- 10. a passenger compartment of a train.
- 11. A passageway dug through the ground, often for vehicles or trains.
- 14. The act of flying or a journey made by air.
- 15. A lamp fueled by gas, often used historically.
- 16. The engine that pulls a train.
- 18. Evidence or an argument establishing a fact.
- 19. A period of 100 years.
- 20. A flat, paper container for letters.
Down
- 1. A commercial activity or enterprise.
- 2. A system of money in general use in a country.
- 3. Letters or packages sent through a postal system.
- 5. Free from disturbance or conflict.
- 7. A connected series of vehicles that run on tracks.
- 9. The currency used in the United States and other countries.
- 12. Feeling sad or discontented.
- 13. A set of steps connecting different floors of a building.
- 17. The warmest season of the year.