Hello! I'd be happy to help you match the words with their correct definitions:
1. guarantee - to promise and deliver a future result
2. return - the money earned on an investment in a certain time period
3. diversification - the practice of putting money into more than one kind of investment
4. liquidity - the ability to quickly convert something into cash
5. retirement - the period of time after people end their working careers
If you have any further questions or need more explanation, feel free to ask!