The concept is different, but in efficient and liquid markets, they could be the same thing. Essentially, you're asking what the "time value of money" is. There are many different instruments whose value is based off of said value - bonds, interest rate futures, interest rate swaps, etc. Therefore, in theory, if you wanted to build a curve that represents the time value of money over time, you could use the implied rates from all of the different sources to form a single curve.
However, as mentioned before by Alex C, there are lots of different curves due to differences in liquidity and some minor market inefficiencies.