1. **Coin** – A small, flat, round piece of metal used as money.

2. **Currency** – A system of money in general use (e.g., coins and banknotes).

3. **Heads** – The front side of a coin, usually featuring a face or symbol.

4. **Tails** – The back side of a coin.

5. **Mint** – A place where coins are produced.

6. **Collector** – Someone who gathers coins as a hobby (numismatist).

7. **Rare coin** – A coin that is hard to find and valuable.

8. **Gold coin / Silver coin** – Precious metal-based currency.

9. **Flipping a coin** – Tossing a coin to make a random decision.

10. **Ancient coins** – Historical coins from old civilizations.