4. Tokens - Refers to the ‘currency’ of projects built on the ethereum network that have raised money via issuing their own tokens.
Tokens can be built on any blockchain, not limited to ethereum.
6. Stable coin - A crypto-currency with extremely low volatility that can be used to trade against the overall market.
7. Scam - brief explanation of "Not Paying"
These two definitions are technically incorrect. Too broad to describe the concepts you're trying to explain.
11. PoW - Proof-of-work. The current consensus algorithm used by Ethereum.
The best description of PoW is the Bitcoin algorithm.
13. Software wallet - storage for crypto-currency that exists purely as software files on a computer.
14. Hardware wallet - a device that can securely store crypto-currency.
Software wallets can store crypto securely and hardware wallets if used poorly can be insecure.
You should brush up on the concepts before explaining them to others.