Foreign exchange and Rate of exchange

Foreign exchange noun - The system by which one currency is exchanged for another; enables international transactions to take place.

Rate of exchange and foreign exchange are semantically related in trade topic. In some cases you can use "Rate of exchange" instead a noun phrase "Foreign exchange".

Rate of exchange noun - The charge for exchanging currency of one country for currency of another.

Foreign exchange and rate of exchange are semantically related in trade topic. You can use "Foreign exchange" instead a noun phrase "Rate of exchange", if it concerns topics such as charge for exchanging currency.